[Using Sakai] Quizz issue

[Biku Shrestha]

Hi,

We have Sakai 2.9.2. We are experiencing some issues with the quizzes.


1.       For some students, the quiz page is blank

2.       For others: after couple of questions, they get syntax error message on the screen.

I checked the logs and found following errors:

Any ideas?

Thank you.
Biku

Sep 20, 2014 10:02:16 AM org.apache.coyote.http11.AbstractHttp11Processor endRequest
SEVERE: Error finishing response
java.lang.NullPointerException
       at org.apache.coyote.http11.InternalNioOutputBuffer.flushBuffer(InternalNioOutputBuffer.java:243)
       at org.apache.coyote.http11.InternalNioOutputBuffer.endRequest(InternalNioOutputBuffer.java:128)
       at org.apache.coyote.http11.AbstractHttp11Processor.endRequest(AbstractHttp11Processor.java:1290)
       at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:360)
       at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
       at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1544)
       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
       at java.lang.Thread.run(Thread.java:662)


Sep 20, 2014 10:02:39 AM org.apache.catalina.connector.CoyoteAdapter log
WARNING: Exception while attempting to add an entry to the access log
java.lang.StringIndexOutOfBoundsException: String index out of range: -795
       at java.lang.String.checkBounds(String.java:397)
       at java.lang.String.<init>(String.java:482)
       at org.apache.tomcat.util.buf.ByteChunk.toStringInternal(ByteChunk.java:505)
       at org.apache.tomcat.util.buf.StringCache.toString(StringCache.java:320)
       at org.apache.tomcat.util.buf.ByteChunk.toString(ByteChunk.java:496)
       at org.apache.tomcat.util.buf.MessageBytes.toString(MessageBytes.java:189)
       at org.apache.catalina.connector.Request.getRequestURI(Request.java:2178)
       at org.apache.catalina.valves.AccessLogValve$RequestElement.addElement(AccessLogValve.java:1567)
       at org.apache.catalina.valves.AccessLogValve.log(AccessLogValve.java:955)
       at org.apache.catalina.core.AccessLogAdapter.log(AccessLogAdapter.java:51)
       at org.apache.catalina.core.StandardEngine.logAccess(StandardEngine.java:371)
       at org.apache.catalina.connector.CoyoteAdapter.log(CoyoteAdapter.java:508)
       at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:348)
       at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:515)
       at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1544)
       at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
       at java.lang.Thread.run(Thread.java:662)

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://collab.sakaiproject.org/pipermail/sakai-user/attachments/20140921/e540207a/attachment.html