[Building Sakai] Application Servers Crashing
Warwick Chapman
warwickchapman at gmail.com
Sun Nov 3 23:56:59 PST 2013
Thank you for the assistance, we eventually settled on:
JAVA_OPTS='-server -d64 -Xmx4g -XX:MaxPermSize=512m
-Djava.awt.headless=true -Dhttp.agent=Sakai'
-- Warwick Bruce Chapman | +27 83 7797 094 | http://warwickchapman.com
On Fri, Nov 1, 2013 at 11:22 AM, David Wafula Wanyonyi <
DavidWafula.Wanyonyi at wits.ac.za> wrote:
> We use Solaris Zones.
> Thanks
> ------------------------------
> *From:* Warwick Chapman [warwickchapman at gmail.com]
> *Sent:* Friday, November 01, 2013 11:04 AM
> *To:* David Wafula Wanyonyi
> *Cc:* sakai-dev
>
> *Subject:* Re: [Building Sakai] Application Servers Crashing
>
> Ps. Are you using OpenVZ as well?
>
> -- Warwick Bruce Chapman | +27 83 7797 094 | http://warwickchapman.com
>
>
> On Fri, Nov 1, 2013 at 10:52 AM, David Wafula Wanyonyi <
> DavidWafula.Wanyonyi at wits.ac.za> wrote:
>
>> Hi,
>> We run servers of almost the same specs, we use the following options and
>> they work just fine with way higher number of sessions:
>>
>> JAVA_OPTS="$JAVA_OPTS -server -d64 -Xmx4g -XX:PermSize=512m
>> -XX:MaxPermSize=1024m -XX:NewSize=512m -XX:MaxNewSize=1024m
>> -Djava.awt.headless=true -Dcom.sun.management.jmxremote
>> -Dsun.lang.ClassLoader.allowArraySyntax=true
>> -Djava.util.Arrays.useLegacyMergeSort=true"
>>
>> You might want up your PermSize.
>>
>> Regards,
>> david.
>>
>> ------------------------------
>> *From:* Warwick Chapman [warwickchapman at gmail.com]
>> *Sent:* Friday, November 01, 2013 10:27 AM
>> *To:* sakai-dev
>> *Subject:* Re: [Building Sakai] Application Servers Crashing
>>
>> The three are running at the moment, with 63 sessions shared between
>> them:
>>
>> root at opportunity:~# uname -a
>> Linux opportunity 2.6.32-19-pve #1 SMP Wed May 15 07:32:52 CEST 2013
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> root at opportunity:~# free -m
>> total used free shared buffers cached
>> Mem: 4096 3679 416 0 0 1968
>> -/+ buffers/cache: 1711 2384
>> Swap: 4096 6 4089
>>
>> root at opportunity:~# w
>> 10:23:19 up 1 day, 14:23, 1 user, load average: 0,16, 0,08, 0,04
>>
>> ---
>>
>> root at opportunity-01:~# uname -a
>> Linux opportunity-01 2.6.32-19-pve #1 SMP Wed May 15 07:32:52 CEST 2013
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> root at opportunity-01:~# free -m
>> total used free shared buffers cached
>> Mem: 4096 2662 1433 0 0 954
>> -/+ buffers/cache: 1708 2387
>> Swap: 4096 3 4092
>>
>> root at opportunity-01:~# w
>> 10:23:54 up 22:56, 1 user, load average: 0,03, 0,05, 0,00
>>
>> ---
>>
>> root at opportunity-10:~# uname -a
>> Linux opportunity-10 2.6.32-20-pve #1 SMP Wed May 15 08:23:27 CEST 2013
>> x86_64 x86_64 x86_64 GNU/Linux
>>
>> root at opportunity-10:~# free -m
>> total used free shared buffers cached
>> Mem: 4096 1778 2317 0 0 146
>> -/+ buffers/cache: 1632 2463
>> Swap: 4096 0 4096
>>
>> root at opportunity-10:~# w
>> 10:24:40 up 10:40, 2 users, load average: 0,00, 0,02, 0,13
>>
>>
>> -- Warwick Bruce Chapman | +27 83 7797 094 | http://warwickchapman.com
>>
>>
>> On Fri, Nov 1, 2013 at 10:04 AM, Warwick Chapman <
>> warwickchapman at gmail.com> wrote:
>>
>>> Hi All
>>>
>>> I'm going mad here. Surely we can expect a four processor, 4G
>>> appserver to handle more than 50 sessions without crashing?
>>>
>>> Mine keep crashing and its causing havoc.
>>>
>>> As they approach 40 sessions, the system load which is usually below
>>> 0.10 start climbing, and then hits 1.00 and eventually I get the
>>> "java.lang.OutOfMemoryError: Java heap space" error.
>>>
>>> *Details*
>>>
>>> 1. Ubuntu 12.04 OpenVZ on Proxmox with 4G RAM and 4 processors
>>> allocated.
>>>
>>> 2. Oracle Java 6:
>>> root at opportunity-10:~# java -version
>>> java version "1.6.0_45"
>>> Java(TM) SE Runtime Environment (build 1.6.0_45-b06)
>>> Java HotSpot(TM) 64-Bit Server VM (build 20.45-b01, mixed mode)
>>>
>>> 3. Environment variables:
>>> root at opportunity-10:~# set | grep JAVA
>>> JAVA_HOME=/usr/lib/jvm/java-6-oracle
>>> JAVA_OPTS='-server -Xms512m -Xmx1024m -XX:PermSize=128m
>>> -XX:MaxPermSize=512m -XX:NewSize=192m -XX:MaxNewSize=384m
>>> -Djava.awt.headless=true -Dhttp.agent=Sakai
>>> -Dorg.apache.jasper.compiler.Parser.STRICT_QUOTE_ESCAPING=false
>>> -Dsun.lang.ClassLoader.allowArraySyntax=true -Duser.language=en
>>> -Duser.region=ZA -Dfile.encoding=UTF-8'
>>>
>>> 4. Sakai 2.9.3 built independently on each app server (also tried
>>> building on one and deploying to others). Custom providers, SMS and only
>>> patch is for UCT SMS.
>>>
>>> 5. Process:
>>> 31032 pts/2 Sl 1:44 /usr/lib/jvm/java-6-oracle/bin/java
>>> -Djava.util.logging.config.file=/opt/tomcat/conf/logging.properties
>>> -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager -server
>>> -Xms512m -Xmx1024m -XX:PermSize=128m -XX:MaxPermSize=512m -XX:NewSize=192m
>>> -XX:MaxNewSize=384m -Djava.awt.headless=true -Dhttp.agent=Sakai
>>> -Dorg.apache.jasper.compiler.Parser.STRICT_QUOTE_ESCAPING=false
>>> -Dsun.lang.ClassLoader.allowArraySyntax=true -Duser.language=en
>>> -Duser.region=ZA -Dfile.encoding=UTF-8
>>> -Djava.endorsed.dirs=/opt/tomcat/endorsed -classpath
>>> /opt/tomcat/bin/bootstrap.jar:/opt/tomcat/bin/tomcat-juli.jar
>>> -Dcatalina.base=/opt/tomcat -Dcatalina.home=/opt/tomcat
>>> -Djava.io.tmpdir=/opt/tomcat/temp org.apache.catalina.startup.Bootstrap
>>> start
>>>
>>> 6. Database server and LDAP server are quiet and not battling with
>>> load at all.
>>>
>>> 7. The underlying host machines are quiet and load is not affecting
>>> them at all and memory usage is safely below available.
>>>
>>> See catalina for the most recent crash:
>>> 2013-11-01 09:37:18,497 WARN http-bio-8080-exec-281
>>> org.sakaiproject.portal.charon.site.DefaultSiteViewImpl - Failed to set
>>> canAddSite for current user. Defaulting to false ...
>>> Exception in thread "PageSavingThread-sakai.profile2"
>>> java.lang.OutOfMemoryError: Java heap space
>>> 2013-11-01 09:41:04,553 ERROR http-bio-8080-exec-256
>>> org.hibernate.transaction.JDBCTransaction - JDBC rollback failed
>>> com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No
>>> operations allowed after connection closed.
>>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>> Method)
>>> at
>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>> at
>>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>>> at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at com.mysql.jdbc.Util.getInstance(Util.java:386)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1304)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1296)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:5028)
>>> at
>>> org.apache.commons.dbcp.DelegatingConnection.rollback(DelegatingConnection.java:328)
>>> at
>>> org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.rollback(PoolingDataSource.java:312)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.invoke(LazyConnectionDataSourceProxy.java:364)
>>> at com.sun.proxy.$Proxy5.rollback(Unknown Source)
>>> at
>>> org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:183)
>>> at
>>> org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:162)
>>> at
>>> org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:674)
>>> at
>>> org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:823)
>>> at
>>> org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:800)
>>> at
>>> org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:339)
>>> at
>>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
>>> at
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>>> at
>>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
>>> at com.sun.proxy.$Proxy42.getPublishedAssessment(Unknown Source)
>>> at
>>> org.sakaiproject.tool.assessment.services.assessment.PublishedAssessmentService.getPublishedAssessment(PublishedAssessmentService.java:189)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.lookupPublishedAssessment(BeginDeliveryActionListener.java:161)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.getPublishedAssessmentBasedOnAction(BeginDeliveryActionListener.java:415)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.processAction(BeginDeliveryActionListener.java:109)
>>> at
>>> javax.faces.event.ActionEvent.processListener(ActionEvent.java:77)
>>> at
>>> javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:669)
>>> at javax.faces.component.UICommand.broadcast(UICommand.java:317)
>>> at javax.faces.component.UIData.broadcast(UIData.java:677)
>>> at
>>> javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:287)
>>> at
>>> javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:401)
>>> at
>>> com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
>>> at
>>> com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
>>> at
>>> com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
>>> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:634)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
>>> at
>>> org.sakaiproject.jsf.util.SamigoJsfTool.dispatch(SamigoJsfTool.java:301)
>>> at org.sakaiproject.jsf.util.JsfTool.doPost(JsfTool.java:256)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
>>> at
>>> org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:511)
>>> at
>>> org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1483)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:213)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doPost(ToolHandler.java:73)
>>> at
>>> org.sakaiproject.portal.charon.SkinnableCharonPortal.doPost(SkinnableCharonPortal.java:1273)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:695)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
>>> at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
>>> at
>>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
>>> at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
>>> at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
>>> at
>>> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
>>> at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
>>> at
>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
>>> at
>>> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
>>> at
>>> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
>>> at
>>> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>>> at java.lang.Thread.run(Thread.java:662)
>>> Caused by: java.lang.OutOfMemoryError: Java heap space
>>> 2013-11-01 09:41:14,635 WARN SakaiClusterService.Maintenance
>>> org.sakaiproject.db.impl.BasicSqlService - Sql.dbRead: sql: select
>>> SERVER_ID from SAKAI_CLUSTER where SERVER_ID = ?
>>> opportunity-10-1383259498265
>>> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
>>> link failure
>>>
>>> The last packet successfully received from the server was 6,629
>>> milliseconds ago. The last packet sent successfully to the server was
>>> 6,629 milliseconds ago.
>>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>> Method)
>>> at
>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>> at
>>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>>> at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at
>>> com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1121)
>>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3673)
>>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3562)
>>> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4113)
>>> at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:927)
>>> at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4689)
>>> at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1304)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2486)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2519)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2304)
>>> at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834)
>>> at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
>>> at
>>> sun.reflect.GeneratedConstructorAccessor680.newInstance(Unknown Source)
>>> at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>> at
>>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>>> at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416)
>>> at
>>> com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:346)
>>> at
>>> org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
>>> at
>>> org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)
>>> at
>>> org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1181)
>>> at
>>> org.apache.commons.dbcp.PoolingDataSource.getConnection(PoolingDataSource.java:96)
>>> at
>>> org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
>>> at
>>> org.sakaiproject.db.impl.BasicSqlService.borrowConnection(BasicSqlService.java:260)
>>> at
>>> org.sakaiproject.db.impl.BasicSqlService.dbRead(BasicSqlService.java:540)
>>> at
>>> org.sakaiproject.db.impl.BasicSqlService.dbRead(BasicSqlService.java:471)
>>> at
>>> org.sakaiproject.cluster.impl.SakaiClusterService$Maintenance.run(SakaiClusterService.java:377)
>>> at java.lang.Thread.run(Thread.java:662)
>>> Caused by: java.io.EOFException: Can not read response from server.
>>> Expected to read 4 bytes, read 0 bytes before connection was unexpectedly
>>> lost.
>>> at com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:3119)
>>> at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:3573)
>>> ... 26 more
>>> 2013-11-01 09:41:27,726 WARN SakaiClusterService.Maintenance
>>> org.sakaiproject.cluster.impl.SakaiClusterService - run(): server has been
>>> closed in cluster table, reopened: opportunity-10-1383259498265
>>> 2013-11-01 09:41:24,623 WARN http-bio-8080-exec-291
>>> org.sakaiproject.portal.util.ErrorReporter - Bug Report bug-id:
>>> 1c74337e-3721-4fb6-812d-85f665ff1da1 user:
>>> 334d3096-e735-4597-9826-a1f6fcb44d1a usage-session:
>>> 9dbb01fb-9a47-4435-b019-3c626f9ec35c time: 01-Nov-2013 09:39:42 user
>>> comment: null stack trace
>>> java.lang.OutOfMemoryError: Java heap space
>>> at java.util.Hashtable.<init>(Hashtable.java:162)
>>> at java.util.Hashtable.<init>(Hashtable.java:183)
>>> at
>>> org.sakaiproject.util.BaseResourceProperties.<init>(BaseResourceProperties.java:82)
>>> at
>>> org.sakaiproject.util.BaseResourcePropertiesEdit.<init>(BaseResourcePropertiesEdit.java:39)
>>> at org.sakaiproject.site.impl.BaseSite.set(BaseSite.java:575)
>>> at org.sakaiproject.site.impl.BaseSite.<init>(BaseSite.java:234)
>>> at
>>> org.sakaiproject.site.impl.BaseSiteService.getCachedSite(BaseSiteService.java:599)
>>> at
>>> org.sakaiproject.site.impl.BaseSiteService.getDefinedSite(BaseSiteService.java:620)
>>> at
>>> org.sakaiproject.site.impl.BaseSiteService.getSite(BaseSiteService.java:709)
>>> at
>>> org.sakaiproject.site.impl.BaseSiteService.getSiteVisit(BaseSiteService.java:787)
>>> at
>>> org.sakaiproject.site.cover.SiteService.getSiteVisit(SiteService.java:140)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:167)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
>>> at
>>> org.sakaiproject.portal.charon.SkinnableCharonPortal.doGet(SkinnableCharonPortal.java:894)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:695)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
>>> at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
>>> at
>>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
>>> at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
>>> at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
>>> at
>>> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
>>> at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
>>> at
>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
>>> at
>>> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
>>> at
>>> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
>>> at
>>> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
>>>
>>> Tool Placement:
>>> No Placement
>>>
>>> Request:
>>> : AuthType:null
>>> : CharEncoding:UTF-8
>>> : ContentLength:-1
>>> : ContentType:null
>>> : ContextPath:/portal
>>> : LocalAddress:192.168.20.5
>>> : LocalName:opportunity-10.da.org.za
>>> : LocalPort:8080
>>> : Method:GET
>>> : PathInfo:/tool/00c1784d-3cb9-4b9f-ada5-4200b82376db/synMainLite
>>> : Protocol:HTTP/1.1
>>> : QueryString:time=1
>>> : RemoteAddress:46.4.206.124
>>> : RemoteHost:46.4.206.124
>>> : RemotePort:56498
>>> : Requested URL:
>>> http://umthombo.da.org.za/portal/tool/00c1784d-3cb9-4b9f-ada5-4200b82376db/synMainLite
>>> : Scheme:http
>>> : ServerName:umthombo.da.org.za
>>> : Headers:
>>> : Header:accept:text/html, application/xhtml+xml, */*
>>> : Header:referer:
>>> http://umthombo.da.org.za/portal/tool/00c1784d-3cb9-4b9f-ada5-4200b82376db/wait
>>> : Header:accept-language:en-ZA
>>> : Header:user-agent:Mozilla/5.0 (compatible; MSIE 10.0; Windows
>>> NT 6.1; WOW64; Trident/6.0)
>>> : Header:accept-encoding:gzip, deflate
>>> : Header:dnt:1
>>> : Header:cookie:---censored---
>>> : Header:host:umthombo.da.org.za
>>> : Header:cache-control:max-age=43200
>>> : Header:connection:keep-alive
>>> : Header:x-forwarded-for:41.13.48.159
>>> : Parameters:
>>> : Parameter:time:0:1
>>> : Attributes:
>>> :
>>> Attribute:sakai.character.encoding.done:sakai.character.encoding.done
>>> : Attribute:sakai.filtered:sakai.filtered
>>> :
>>> Attribute:sakai.session:org.sakaiproject.tool.impl.MySession at a064900
>>> Session:
>>> : Created:1383291288806
>>> : LastAccess:1383291671451
>>> : MaxInactive:3600
>>> : Attributes:
>>> : Attribute:portalskin:neoskin
>>>
>>> 2013-11-01 09:41:35,971 WARN http-bio-8080-exec-256
>>> org.hibernate.util.JDBCExceptionReporter - SQL Error: 0, SQLState: null
>>> 2013-11-01 09:41:35,971 ERROR http-bio-8080-exec-256
>>> org.hibernate.util.JDBCExceptionReporter - Already closed.
>>> 2013-11-01 09:42:09,783 WARN http-bio-8080-exec-256
>>> org.hibernate.util.JDBCExceptionReporter - SQL Error: 0, SQLState: null
>>> 2013-11-01 09:42:09,783 ERROR http-bio-8080-exec-256
>>> org.hibernate.util.JDBCExceptionReporter - Already closed.
>>> 2013-11-01 09:45:04,447 ERROR http-bio-8080-exec-256
>>> org.springframework.transaction.interceptor.TransactionInterceptor -
>>> Application exception overridden by rollback exception
>>> java.lang.OutOfMemoryError: Java heap space
>>> 2013-11-01 09:45:04,447 ERROR http-bio-8080-exec-256
>>> org.sakaiproject.tool.assessment.services.assessment.PublishedAssessmentService
>>> - org.springframework.transaction.TransactionSystemException: Could not
>>> roll back Hibernate transaction; nested exception is
>>> org.hibernate.TransactionException: JDBC rollback failed
>>> 2013-11-01 09:45:04,447 ERROR http-bio-8080-exec-256
>>> com.sun.faces.lifecycle.InvokeApplicationPhase -
>>> org.springframework.transaction.TransactionSystemException: Could not roll
>>> back Hibernate transaction; nested exception is
>>> org.hibernate.TransactionException: JDBC rollback failed
>>> java.lang.RuntimeException:
>>> org.springframework.transaction.TransactionSystemException: Could not roll
>>> back Hibernate transaction; nested exception is
>>> org.hibernate.TransactionException: JDBC rollback failed
>>> at
>>> org.sakaiproject.tool.assessment.services.assessment.PublishedAssessmentService.getPublishedAssessment(PublishedAssessmentService.java:195)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.lookupPublishedAssessment(BeginDeliveryActionListener.java:161)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.getPublishedAssessmentBasedOnAction(BeginDeliveryActionListener.java:415)
>>> at
>>> org.sakaiproject.tool.assessment.ui.listener.delivery.BeginDeliveryActionListener.processAction(BeginDeliveryActionListener.java:109)
>>> at
>>> javax.faces.event.ActionEvent.processListener(ActionEvent.java:77)
>>> at
>>> javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:669)
>>> at javax.faces.component.UICommand.broadcast(UICommand.java:317)
>>> at javax.faces.component.UIData.broadcast(UIData.java:677)
>>> at
>>> javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:287)
>>> at
>>> javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:401)
>>> at
>>> com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:95)
>>> at
>>> com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
>>> at
>>> com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:110)
>>> at javax.faces.webapp.FacesServlet.service(FacesServlet.java:213)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:634)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:412)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
>>> at
>>> org.sakaiproject.jsf.util.SamigoJsfTool.dispatch(SamigoJsfTool.java:301)
>>> at org.sakaiproject.jsf.util.JsfTool.doPost(JsfTool.java:256)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:749)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:487)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379)
>>> at
>>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:339)
>>> at
>>> org.sakaiproject.tool.impl.ActiveToolComponent$MyActiveTool.forward(ActiveToolComponent.java:511)
>>> at
>>> org.sakaiproject.portal.charon.SkinnableCharonPortal.forwardTool(SkinnableCharonPortal.java:1483)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doTool(ToolHandler.java:213)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doGet(ToolHandler.java:96)
>>> at
>>> org.sakaiproject.portal.charon.handlers.ToolHandler.doPost(ToolHandler.java:73)
>>> at
>>> org.sakaiproject.portal.charon.SkinnableCharonPortal.doPost(SkinnableCharonPortal.java:1273)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
>>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.sakaiproject.util.RequestFilter.doFilter(RequestFilter.java:695)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
>>> at
>>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
>>> at
>>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
>>> at
>>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
>>> at
>>> org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
>>> at
>>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
>>> at
>>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
>>> at
>>> org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
>>> at
>>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
>>> at
>>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
>>> at
>>> org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
>>> at
>>> org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
>>> at
>>> org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>>> at
>>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>>> at java.lang.Thread.run(Thread.java:662)
>>> Caused by: org.springframework.transaction.TransactionSystemException:
>>> Could not roll back Hibernate transaction; nested exception is
>>> org.hibernate.TransactionException: JDBC rollback failed
>>> at
>>> org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:677)
>>> at
>>> org.springframework.transaction.support.AbstractPlatformTransactionManager.processRollback(AbstractPlatformTransactionManager.java:823)
>>> at
>>> org.springframework.transaction.support.AbstractPlatformTransactionManager.rollback(AbstractPlatformTransactionManager.java:800)
>>> at
>>> org.springframework.transaction.interceptor.TransactionAspectSupport.completeTransactionAfterThrowing(TransactionAspectSupport.java:339)
>>> at
>>> org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:110)
>>> at
>>> org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
>>> at
>>> org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
>>> at com.sun.proxy.$Proxy42.getPublishedAssessment(Unknown Source)
>>> at
>>> org.sakaiproject.tool.assessment.services.assessment.PublishedAssessmentService.getPublishedAssessment(PublishedAssessmentService.java:189)
>>> ... 59 more
>>> Caused by: org.hibernate.TransactionException: JDBC rollback failed
>>> at
>>> org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:170)
>>> at
>>> org.springframework.orm.hibernate3.HibernateTransactionManager.doRollback(HibernateTransactionManager.java:674)
>>> ... 67 more
>>> Caused by:
>>> com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No
>>> operations allowed after connection closed.
>>> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
>>> Method)
>>> at
>>> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>> at
>>> java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>>> at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
>>> at com.mysql.jdbc.Util.getInstance(Util.java:386)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)
>>> at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1304)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:1296)
>>> at
>>> com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:5028)
>>> at
>>> org.apache.commons.dbcp.DelegatingConnection.rollback(DelegatingConnection.java:328)
>>> at
>>> org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.rollback(PoolingDataSource.java:312)
>>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>> at
>>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>> at
>>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>> at java.lang.reflect.Method.invoke(Method.java:597)
>>> at
>>> org.springframework.jdbc.datasource.LazyConnectionDataSourceProxy$LazyConnectionInvocationHandler.invoke(LazyConnectionDataSourceProxy.java:364)
>>> at com.sun.proxy.$Proxy5.rollback(Unknown Source)
>>> at
>>> org.hibernate.transaction.JDBCTransaction.rollbackAndResetAutoCommit(JDBCTransaction.java:183)
>>> at
>>> org.hibernate.transaction.JDBCTransaction.rollback(JDBCTransaction.java:162)
>>> ... 68 more
>>> Caused by: java.lang.OutOfMemoryError: Java heap space
>>> 2013-11-01 09:45:29,599 ERROR http-bio-8080-exec-295
>>> edu.amc.sakai.user.JLDAPDirectoryProvider - getUser() failed [eid:
>>> 7306145161083]
>>> LDAPException: Client request timed out (85) LDAP Timeout
>>> at com.novell.ldap.Message$Timeout.run(Unknown Source)
>>> 2013-11-01 09:45:29,600 ERROR http-bio-8080-exec-289
>>> edu.amc.sakai.user.JLDAPDirectoryProvider - getUser() failed [eid:
>>> 5804290142082]
>>> LDAPException: Client request timed out (85) LDAP Timeout
>>> at com.novell.ldap.Message$Timeout.run(Unknown Source)
>>> 2013-11-01 09:45:29,600 ERROR http-bio-8080-exec-284
>>> edu.amc.sakai.user.JLDAPDirectoryProvider - getUser() failed [eid:
>>> 5911295089083]
>>> LDAPException: Client request timed out (85) LDAP Timeout
>>> at com.novell.ldap.Message$Timeout.run(Unknown Source)
>>> 2013-11-01 09:45:34,406 WARN http-bio-8080-exec-302
>>> org.sakaiproject.portal.util.ErrorReporter - Bug Report bug-id:
>>> 4b8c41bb-ec01-41ed-8186-02448c497c6c user: null usage-session: null time:
>>> 01-Nov-2013 09:45:29 user comment: null stack trace
>>> org.sakaiproject.portal.api.PortalHandlerException:
>>> java.lang.RuntimeException: authenticateUser(): LDAPException during
>>> authentication attempt [userLogin = support][result code = LDAP
>>> Timeout][error message = null]
>>> at
>>> org.sakaiproject.portal.charon.handlers.XLoginHandler.doPost(XLoginHandler.java:50)
>>> caused by: java.lang.RuntimeException: authenticateUser(): LDAPException
>>> during authentication attempt [userLogin = support][result code = LDAP
>>> Timeout][error message = null]
>>> at
>>> org.sakaiproject.user.impl.BaseUserDirectoryService.getProviderAuthenticatedUser(BaseUserDirectoryService.java:1597)
>>> caused by: LDAPException: Client request timed out (85) LDAP Timeout
>>> at com.novell.ldap.Message$Timeout.run(null:-1)
>>>
>>> Tool Placement:
>>> No Placement
>>>
>>> Request:
>>> : AuthType:null
>>> : CharEncoding:UTF-8
>>> : ContentLength:33
>>> : ContentType:application/x-www-form-urlencoded
>>> : ContextPath:/portal
>>> : LocalAddress:192.168.20.5
>>> : LocalName:opportunity-10.da.org.za
>>> : LocalPort:8080
>>> : Method:POST
>>> : PathInfo:/xlogin
>>> : Protocol:HTTP/1.1
>>> : QueryString:null
>>> : RemoteAddress:46.4.206.124
>>> : RemoteHost:46.4.206.124
>>> : RemotePort:56684
>>> : Requested URL:http://umthombo.da.org.za/portal/xlogin
>>> : Scheme:http
>>> : ServerName:umthombo.da.org.za
>>> : Headers:
>>> : Header:host:umthombo.da.org.za
>>> : Header:content-length:33
>>> :
>>> Header:accept:text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
>>> : Header:origin:http://umthombo.da.org.za
>>> : Header:user-agent:Mozilla/5.0 (Windows NT 6.2; WOW64)
>>> AppleWebKit/537.36 (KHTML, like Gecko) Chrome/30.0.1599.101 Safari/537.36
>>> : Header:content-type:application/x-www-form-urlencoded
>>> : Header:referer:http://umthombo.da.org.za/portal
>>> : Header:accept-encoding:gzip,deflate,sdch
>>> : Header:accept-language:en-US,en;q=0.8
>>> : Header:cookie:---censored---
>>> : Header:via:1.1 proxy.iuncapped.co.za (squid/3.1.10)
>>> : Header:x-forwarded-for:192.168.35.1
>>> : Header:x-forwarded-for:41.216.135.90
>>> : Header:cache-control:max-age=259200
>>> : Header:connection:keep-alive
>>> : Parameters:
>>> : Parameter:eid:0:----censored----
>>> : Parameter:pw:0:----censored----
>>> : Parameter:submit:0:Login
>>> : Attributes:
>>> :
>>> Attribute:sakai.character.encoding.done:sakai.character.encoding.done
>>> : Attribute:sakai.filtered:sakai.filtered
>>> :
>>> Attribute:sakai.session:org.sakaiproject.tool.impl.MySession at 20cce106
>>> Session:
>>> : Created:1383290355854
>>> : LastAccess:1383291929601
>>> : MaxInactive:3600
>>> : Attributes:
>>> : Attribute:portalskin:neoskin
>>>
>>> 2013-11-01 09:45:34,406 WARN http-bio-8080-exec-302
>>> org.sakaiproject.email.impl.BasicEmailService - send:
>>> javax.mail.internet.AddressException: Illegal address in string ``''
>>> Exception in thread "Thread-12" java.lang.OutOfMemoryError: Java heap
>>> space
>>>
>>>
>>> -- Warwick Bruce Chapman | +27 83 7797 094 | http://warwickchapman.com
>>>
>>
>> This communication is intended
>> for the addressee only. It is confidential. If you have received this communication in error, please notify us immediately and destroy the original message. You may not copy or disseminate this communication without the permission of the University. Only authorised
>> signatories are competent to enter into agreements on behalf of the University and recipients are thus advised that the content of this message may not be legally binding on the University and may contain the personal views and opinions of the author, which
>> are not necessarily the views and opinions of The University of the Witwatersrand, Johannesburg. All agreements between the University and outsiders are subject to South African Law unless the University agrees in writing to the contrary.
>>
>>
> This communication is intended for the addressee only. It is confidential. If you have received this communication in error, please notify us immediately and destroy the original message. You may not copy or disseminate this communication without the permission of the University. Only authorised signatories are competent to enter into agreements on behalf of the University and recipients are thus advised that the content of this message may not be legally binding on the University and may contain the personal views and opinions of the author, which are not necessarily the views and opinions of The University of the Witwatersrand, Johannesburg. All agreements between the University and outsiders are subject to South African Law unless the University agrees in writing to the contrary.
>
>
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