[SYNAPSE-592] If a url with a space submitted to the synapse, nhttp transport goes in to an infinite loop

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.0
• Assignee: Ruwan Linton
• Reporter: Supun Kamburugamuva
• Created: 13/Oct/09 22:45
• Updated: 24/Nov/09 08:22
• Resolved: 24/Nov/09 08:22

Description

I've submitted an invalid url (a url with a space) to synapse. When this happens NIO transport goes to an infinite loop. It shows the following exception repeatedly. The reason for this is a Null point exception.

In case of HTTP error, synapse ServerHandler doesn't get called for the input. But the outputready method of the ServerHandler is called. In the output ready method we check a output buffer variable. But since the input is not given to syanpse this buffer is not set. Resulting in the null point. I've done a simple fix to avoid this. But I think this should be handled in the HTTP Core Nio level. It shouldn't call the output ready method when there is an error.

2009-10-13 15:07:46,671 [-] [http-Listener I/O dispatcher-1] WARN HttpCoreNIOListener System may be unstable: IOReactor encountered a runtime exception : null
java.lang.NullPointerException
at org.apache.synapse.transport.nhttp.ServerHandler.outputReady(ServerHandler.java:209)
at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:207)
at org.apache.http.impl.nio.DefaultServerIOEventDispatch.outputReady(DefaultServerIOEventDispatch.java:153)
at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:185)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:342)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:319)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:275)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:528)
at java.lang.Thread.run(Thread.java:595)
2009-10-13 15:07:46,750 [-] [http-Listener I/O dispatcher-1] WARN HttpCoreNIOListener System may be unstable: IOReactor encountered a runtime exception : null
java.lang.NullPointerException
at org.apache.synapse.transport.nhttp.ServerHandler.outputReady(ServerHandler.java:209)
at org.apache.http.impl.nio.DefaultNHttpServerConnection.produceOutput(DefaultNHttpServerConnection.java:207)
at org.apache.http.impl.nio.DefaultServerIOEventDispatch.outputReady(DefaultServerIOEventDispatch.java:153)
at org.apache.http.impl.nio.reactor.BaseIOReactor.writable(BaseIOReactor.java:185)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:342)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:319)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:275)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:528)
at java.lang.Thread.run(Thread.java:595)
2009-10-13 15:07:46,843 [-] [http-Listener I/O dispatcher-1] WARN HttpCoreNIOListener System may be unstable: IOReactor encountered a runtime exception : null
java.lang.NullPointerException

Issue Links

• duplicates: SYNAPSE-584 Enhance the non-blocking HTTP/S transports to recover from possible exceptions