[Building Sakai] Quizz issue
Biku Shrestha
blshrestha at mum.edu
Sun Sep 21 21:10:23 PDT 2014
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)
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