11:07 a.m.
[
https://issues.jboss.org/browse/ISPN-2836?page=com.atlassian.jira.plugin....
]
Bela Ban commented on ISPN-2836:
--------------------------------
OK, so you confirmed that the issue doesn't occur with use_send-queues disabled.
For the exceptions above you'll have to contact one of the Infinispan guys to look
into, as it's probably an Infinispan/Radargun issue.
I'll run this test (when I get to it) to get to the bottom of the senders-blocking
issue. But meanwhile the 2 workarounds of disabling use_send_queues or using UDP exist.
Thread deadlock in Map/Reduce with 2 nodes
------------------------------------------
Key: ISPN-2836
URL: https://issues.jboss.org/browse/ISPN-2836
Project: Infinispan
Issue Type: Bug
Components: Distributed Execution and Map/Reduce
Affects Versions: 5.2.1.Final
Reporter: Alan Field
Assignee: Vladimir Blagojevic
Attachments: afield-tcp-521-final.txt, udp-edg-perf01.txt, udp-edg-perf02.txt
Using RadarGun and two nodes to execute the example WordCount Map/Reduce job against a
cache with ~550 keys with a value size of 1MB is producing a thread deadlock. The cache is
distributed with transactions disabled.
TCP transport deadlocks without throwing an exception. Disabling the send queue and
setting UNICAST2.conn_expiry_timeout=0 prevents the deadlock, but the job does not
complete. The nodes send "are-you-alive" messages back and forth, and I have
seen the following exception:
{noformat}
11:44:29,970 ERROR [org.jgroups.protocols.TCP] (OOB-98,default,edg-perf01-1907) failed
sending message to edg-perf02-32536 (76 bytes): java.net.SocketException: Socket closed,
cause: null
at
org.infinispan.distexec.mapreduce.MapReduceTask.execute(MapReduceTask.java:352)
at
org.radargun.cachewrappers.InfinispanMapReduceWrapper.executeMapReduceTask(InfinispanMapReduceWrapper.java:98)
at org.radargun.stages.MapReduceStage.executeOnSlave(MapReduceStage.java:74)
at org.radargun.Slave$2.run(Slave.java:103)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:439)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.util.concurrent.ExecutionException: org.infinispan.CacheException:
org.jgroups.TimeoutException: timeout sending message to edg-perf02-32536
at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
at java.util.concurrent.FutureTask.get(FutureTask.java:83)
at
org.infinispan.distexec.mapreduce.MapReduceTask$TaskPart.get(MapReduceTask.java:832)
at
org.infinispan.distexec.mapreduce.MapReduceTask.executeMapPhaseWithLocalReduction(MapReduceTask.java:477)
at
org.infinispan.distexec.mapreduce.MapReduceTask.execute(MapReduceTask.java:350)
... 9 more
Caused by: org.infinispan.CacheException: org.jgroups.TimeoutException: timeout sending
message to edg-perf02-32536
at org.infinispan.util.Util.rewrapAsCacheException(Util.java:541)
at
org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.invokeRemoteCommand(CommandAwareRpcDispatcher.java:186)
at
org.infinispan.remoting.transport.jgroups.JGroupsTransport.invokeRemotely(JGroupsTransport.java:515)
11:44:29,978 ERROR [org.jgroups.protocols.TCP] (Timer-3,default,edg-perf01-1907) failed
sending message to edg-perf02-32536 (60 bytes): java.net.SocketException: Socket closed,
cause: null
at
org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:175)
at
org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:197)
at
org.infinispan.remoting.rpc.RpcManagerImpl.invokeRemotely(RpcManagerImpl.java:254)
at org.infinispan.remoting.rpc.RpcManagerImpl.access$000(RpcManagerImpl.java:80)
at org.infinispan.remoting.rpc.RpcManagerImpl$1.call(RpcManagerImpl.java:288)
... 5 more
Caused by: org.jgroups.TimeoutException: timeout sending message to edg-perf02-32536
at org.jgroups.blocks.MessageDispatcher.sendMessage(MessageDispatcher.java:390)
at
org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.processSingleCall(CommandAwareRpcDispatcher.java:301)
11:44:29,979 ERROR [org.jgroups.protocols.TCP] (Timer-4,default,edg-perf01-1907) failed
sending message to edg-perf02-32536 (63 bytes): java.net.SocketException: Socket closed,
cause: null
at
org.infinispan.remoting.transport.jgroups.CommandAwareRpcDispatcher.invokeRemoteCommand(CommandAwareRpcDispatcher.java:179)
... 11 more
{noformat}
With UDP transport, both threads are deadlocked. I will attach thread dumps from runs
using TCP and UDP transport.
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Bela Ban (JIRA)