Hi Alexey,
I fear it won't be feasible to create a working sample for you, as the problem happens once every 10,000 transactions and I'm quite sure it will not happen on a sample level complexity.
Before troubling you with a patch, could you explain briefly on what scenarios would such an action happen?
Tiran Meltser
System Architect
Global Products & Operations
Comverse - Making Your Network Smarter
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From: Oleksiy Stashok [mailto:oleksiy.stashok_at_oracle.com]
Sent: Wednesday, February 11, 2015 11:22 AM
To: users_at_grizzly.java.net
Subject: Re: Exception during FilterChain execution
Hi Tiran,
is it possible for you to create a testcase so I can try to reproduce the problem locally?
Or I can prepare you a patch and try to find out when exactly MultiLinePacket gets saved to the FilterChain store.
WBR,
Alexey.
On 11.02.15 01:04, Meltser Tiran wrote:
Hi Alexey,
I call filterChainCtx.getStopAction() [note without arguments] in 2 places:
1. In the MultiLinePacket itself, following the same logic of the MultiLinePacket shown in the examples; note it is used for front end and backend filter chains
2. Right after closing the front end client's connection (connection.close()); this also causes the backend server connection to be closed
Please note that the stack trace shows the problem happens when writing a request to my backend server (I'm acting as a client here, in general I'm a proxy so I both a server and a client at the same time, using Grizzly both way).
Hope that sheds some light on the issue.
Tiran Meltser
System Architect
Global Products & Operations
Comverse - Making Your Network Smarter
T +972-3-7678381
M +972-54-5639381
Tiran.Meltser_at_comverse.com <mailto:Tiran.Meltser_at_comverse.com>
www.comverse.com<
http://www.comverse.com/>
P Please think of the environment before printing this email
From: Oleksiy Stashok [mailto:oleksiy.stashok_at_oracle.com]
Sent: Wednesday, February 11, 2015 10:39 AM
To: users_at_grizzly.java.net<mailto:users_at_grizzly.java.net>
Subject: Re: Exception during FilterChain execution
Hi Tiran,
do you ever call something like
filterChainCtx.getStopAction(multiLinePacket)?
WBR,
Alexey.
On 10.02.15 22:55, Meltser Tiran wrote:
Hi,
When running a load test on our applications, a very small percentage of the requests fails with the following exception:
WARNING: GRIZZLY0013: Exception during FilterChain execution
java.lang.ClassCastException: com.comverse.mist.app.rte.grizzly.filters.io.payload.MultiLinePacket cannot be cast to org.glassfish.grizzly.Appendable
at org.glassfish.grizzly.filterchain.DefaultFilterChain$FilterStateElement.append(DefaultFilterChain.java:701)
at org.glassfish.grizzly.filterchain.DefaultFilterChain$FilterStateElement.access$600(DefaultFilterChain.java:640)
at org.glassfish.grizzly.filterchain.DefaultFilterChain$FiltersState.append(DefaultFilterChain.java:634)
at org.glassfish.grizzly.filterchain.DefaultFilterChain$FiltersState.access$200(DefaultFilterChain.java:571)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.checkStoredMessage(DefaultFilterChain.java:510)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:197)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.write(DefaultFilterChain.java:413)
at org.glassfish.grizzly.nio.NIOConnection.write(NIOConnection.java:418)
at org.glassfish.grizzly.nio.NIOConnection.write(NIOConnection.java:382)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.writeCommandRequestToEndPoint(AbstractProtocolCommandDispatcher.java:611)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.doDispatchCommandRequest(AbstractProtocolCommandDispatcher.java:357)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.doDispatchCommandRequest(AbstractProtocolCommandDispatcher.java:324)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.dispatchCommandRequest(AbstractProtocolCommandDispatcher.java:209)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.doDispatchCommandResponse(AbstractProtocolCommandDispatcher.java:547)
at com.comverse.mist.app.rte.protocol.command.AbstractProtocolCommandDispatcher.dispatchCommandResponse(AbstractProtocolCommandDispatcher.java:369)
at com.comverse.mist.app.rte.grizzly.filters.AbstractProtocolEndPointFilter.handleRead(AbstractProtocolEndPointFilter.java:184)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:283)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:132)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:111)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:536)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
The object failing to be casted in our derivation of the MultiLinePacket (which doesn't implement Appendable of course, similar to the original MultiLinePacket).
Can someone advise on why are we getting this error and what leads to this flow (after all, the vast majority of the flows pass without a problem)?
Tiran Meltser
System Architect
Global Products & Operations
Comverse - Making Your Network Smarter
T +972-3-7678381
M +972-54-5639381
Tiran.Meltser_at_comverse.com <mailto:Tiran.Meltser_at_comverse.com>
www.comverse.com<
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P Please think of the environment before printing this email
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