thread pool is full
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kumar bava
Jan 27, 2023, 11:23:19 AM1/27/23
to jgroups-dev
Hi Bela !
Randomly in our cluster(s) we see below log, followed by a thread dump:
Randomly in our cluster(s) we see below log, followed by a thread dump:
FATAL Log4J2LogImpl.java:126: xx: thread pool is full (max=200, active=200); thread dump (dumped once, until thread_dump is reset):
==========thread dump================
"Reference Handler" #2 prio=0 tid=0x2 nid=NA runnable
java.lang.Thread.State: RUNNABLE
at java...@11.0.15/java.lang.ref.Reference.waitForReferencePendingList(Native Method)
at java...@11.0.15/java.lang.ref.Reference.processPendingReferences(Reference.java:241)
at java...@11.0.15/java.lang.ref.Reference$ReferenceHandler.run(Reference.java:213)
"Finalizer" #3 prio=0 tid=0x3 nid=NA waiting
java.lang.Thread.State: WAITING
at java...@11.0.15/java.lang.Object.wait(Native Method)
- waiting on <0x5682507c> (a java.lang.ref.ReferenceQueue$Lock)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176)
at java...@11.0.15/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:170)
"Signal Dispatcher" #4 prio=0 tid=0x4 nid=NA runnable
java.lang.Thread.State: RUNNABLE
"Common-Cleaner" #10 prio=0 tid=0xa nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/java.lang.Object.wait(Native Method)
- waiting on <0x25ae7778> (a java.lang.ref.ReferenceQueue$Lock)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
at java...@11.0.15/jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:148)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
at java...@11.0.15/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:161)
"RxSchedulerPurge-1" #16 prio=0 tid=0x10 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x13724708> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1054)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
"RxCachedWorkerPoolEvictor-1" #17 prio=0 tid=0x11 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x42f62aca> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1054)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
"Timer runner-2,mss-web,stg-snd-1-t14-37499" #19 prio=0 tid=0x13 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x6b39358> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.DelayQueue.take(DelayQueue.java:229)
at java...@11.0.15/java.util.concurrent.DelayQueue.take(DelayQueue.java:77)
at app//org.jgroups.util.TimeScheduler3.run(TimeScheduler3.java:194)
==========thread dump================
"Reference Handler" #2 prio=0 tid=0x2 nid=NA runnable
java.lang.Thread.State: RUNNABLE
at java...@11.0.15/java.lang.ref.Reference.waitForReferencePendingList(Native Method)
at java...@11.0.15/java.lang.ref.Reference.processPendingReferences(Reference.java:241)
at java...@11.0.15/java.lang.ref.Reference$ReferenceHandler.run(Reference.java:213)
"Finalizer" #3 prio=0 tid=0x3 nid=NA waiting
java.lang.Thread.State: WAITING
at java...@11.0.15/java.lang.Object.wait(Native Method)
- waiting on <0x5682507c> (a java.lang.ref.ReferenceQueue$Lock)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176)
at java...@11.0.15/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:170)
"Signal Dispatcher" #4 prio=0 tid=0x4 nid=NA runnable
java.lang.Thread.State: RUNNABLE
"Common-Cleaner" #10 prio=0 tid=0xa nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/java.lang.Object.wait(Native Method)
- waiting on <0x25ae7778> (a java.lang.ref.ReferenceQueue$Lock)
at java...@11.0.15/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
at java...@11.0.15/jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:148)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
at java...@11.0.15/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:161)
"RxSchedulerPurge-1" #16 prio=0 tid=0x10 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x13724708> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1054)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
"RxCachedWorkerPoolEvictor-1" #17 prio=0 tid=0x11 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x42f62aca> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1182)
at java...@11.0.15/java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:899)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1054)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114)
at java...@11.0.15/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java...@11.0.15/java.lang.Thread.run(Thread.java:829)
"Timer runner-2,mss-web,stg-snd-1-t14-37499" #19 prio=0 tid=0x13 nid=NA timed_waiting
java.lang.Thread.State: TIMED_WAITING
at java...@11.0.15/jdk.internal.misc.Unsafe.park(Native Method)
- parking to wait for <0x6b39358> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java...@11.0.15/java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:234)
at java...@11.0.15/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2123)
at java...@11.0.15/java.util.concurrent.DelayQueue.take(DelayQueue.java:229)
at java...@11.0.15/java.util.concurrent.DelayQueue.take(DelayQueue.java:77)
at app//org.jgroups.util.TimeScheduler3.run(TimeScheduler3.java:194)
==========thread dump================
When its seen member fails to do its operation(e.g., infinspan locking. We are using jgroup as part of infinispan-13.0.5).
Looking at the logs, its happening when majority of the members leaving the cluster.
Looking at the logs, its happening when majority of the members leaving the cluster.
Our jgroup config is :
========jgroup config=======
========jgroup config=======
========jgroup config=======
<config xmlns="urn:org:jgroups"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/jgroups.xsd"
>
<UDP
bind_addr="match-interface:{{ mssweb_bind_addr }}"
mcast_port="${jgroups.udp.mcast_port:{{ mssweb_mcast_port }}}"
mcast_addr="{{ mssweb_mcast_group_addr }}"
enable_diagnostics="false"
thread_pool.min_threads="0"
thread_pool.max_threads="200"
thread_pool.keep_alive_time="30000"/>
<PING num_discovery_runs="5"/>
<MERGE3 max_interval="30000"
min_interval="10000"/>
<FD_SOCK/>
<FD_ALL3/>
<VERIFY_SUSPECT timeout="1500" />
<BARRIER />
<pbcast.NAKACK2 xmit_interval="500"/>
<UNICAST3 xmit_interval="500" />
<pbcast.STABLE desired_avg_gossip="50000"
max_bytes="4M"/>
<pbcast.GMS print_local_addr="true" join_timeout="5000"/>
<UFC max_credits="10M"
min_threshold="0.4"/>
<MFC max_credits="10M"
min_threshold="0.4"/>
<FRAG2 frag_size="60K" />
<pbcast.STATE_TRANSFER />
<CENTRAL_LOCK />
</config>
Number of members in the cluster : 8
We would need help to understand the probable root-cause for it and anyway to avoid this problem by optimizing the configuration(Before we just go ahead to increase the max_threads value) ?
Btw, we have another cluster(over gossiprouter) with the config :
===========jgroup========
where we have the same problem, except that "max_threads" value here is : 100.
What would be the configuration if we want to provide customized value to "max_threads"?
===========jgroup========
<?xml version="1.0"?>
<config
xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/jgroups.xsd"
xmlns="urn:org:jgroups"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<TUNNEL bind_addr="match-interface:{{ msssite_bind_addr }}"
bind_port="0"
use_nio="false"
gossip_router_hosts="{{ sndHostList }}"
port_range="0" />
<PING />
<MERGE3 />
<FD_ALL3 />
<VERIFY_SUSPECT />
<pbcast.NAKACK2 use_mcast_xmit="false" />
<UNICAST3 />
<pbcast.STABLE />
<pbcast.GMS />
<UFC />
<FRAG2 />
<pbcast.STATE_TRANSFER />
<CENTRAL_LOCK />
</config>
======jgroup================where we have the same problem, except that "max_threads" value here is : 100.
What would be the configuration if we want to provide customized value to "max_threads"?
Bela Ban
Jan 30, 2023, 6:18:12 AM1/30/23
to jgrou...@googlegroups.com
This happens when the thread pool is exhausted (200); then all threads
are dumped. However, in your thread dump below I don't see 200 threads;
as a matter of fact, I don't see a *single JGroups thread*!
Can you post the full thread dump?
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Bela Ban | http://www.jgroups.org
are dumped. However, in your thread dump below I don't see 200 threads;
as a matter of fact, I don't see a *single JGroups thread*!
Can you post the full thread dump?
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--
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Bela Ban
Mar 7, 2023, 3:06:05 PM3/7/23
to jgrou...@googlegroups.com
Your thread pool's max size is 100, and the thread dump shows that you
have 58 threads in BLOCKED state waiting to lock <0x6f4dcd31>, e.g.:
"jgroups-11402,mss-site,sero-nfsorch-1-f13-97" #12477 prio=0 tid=0x30bd
nid=NA blocked
java.lang.Thread.State: BLOCKED
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.onNewView(SingleTargetRequest.java:56)
#011- waiting to lock <0x6f4dcd31> (a
org.infinispan.remoting.transport.impl.SingleResponseCollector)
That lock is held by thread jgroups-11397:
"jgroups-11397,mss-site,sero-nfsorch-1-f13-97" #12471 prio=0 tid=0x30b7
nid=NA runnable
java.lang.Thread.State: RUNNABLE#011at
java...@11.0.12/sun.util.locale.BaseLocale.hashCode(BaseLocale.java:148)
#011at java...@11.0.12/java.util.Locale.hashCode(Locale.java:2103)
#011at
java...@11.0.12/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
#011at
java...@11.0.12/sun.util.locale.provider.LocaleProviderAdapter.getAdapter(LocaleProviderAdapter.java:241)
#011at
java...@11.0.12/java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:178)
#011at java...@11.0.12/java.util.Formatter.getZero(Formatter.java:2437)
#011at java...@11.0.12/java.util.Formatter.<init>(Formatter.java:1956)
#011at java...@11.0.12/java.util.Formatter.<init>(Formatter.java:2011)
#011at java...@11.0.12/java.lang.String.format(String.java:2938)
#011at
app//org.infinispan.util.logging.Log_$logger.remoteNodeSuspected(Log_$logger.java:1970)
#011at
app//org.infinispan.remoting.transport.ResponseCollectors.remoteNodeSuspected(ResponseCollectors.java:31)
#011at
app//org.infinispan.remoting.transport.impl.SingleResponseCollector.targetNotFound(SingleResponseCollector.java:31)
#011at
app//org.infinispan.remoting.transport.impl.SingleResponseCollector.targetNotFound(SingleResponseCollector.java:17)
#011at
app//org.infinispan.remoting.transport.ValidSingleResponseCollector.addResponse(ValidSingleResponseCollector.java:23)
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.addResponse(SingleTargetRequest.java:74)
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.onResponse(SingleTargetRequest.java:44)
#011- locked <0x6f4dcd31> (a
org.infinispan.remoting.transport.impl.SingleResponseCollector)
#011at
app//org.infinispan.remoting.transport.impl.RequestRepository.addResponse(RequestRepository.java:51)
This thread is in RUNNABLE state, but I suspect that the
Log.remoteNodeSuspected() statement is taking quite a while, so that the
thread pool increases to 100, and thus the thread dump by JGroups (as a
warning).
So this might be a temporary spike, but I recommend looking into how
long the above log method takes, so that it has other threads queuing up
for the <0x6f4dcd31> lock.
> https://groups.google.com/d/msgid/jgroups-dev/4e5e066d-a2b3-44bb-ab15-6a83c60406f1n%40googlegroups.com <https://groups.google.com/d/msgid/jgroups-dev/4e5e066d-a2b3-44bb-ab15-6a83c60406f1n%40googlegroups.com> <https://groups.google.com/d/msgid/jgroups-dev/4e5e066d-a2b3-44bb-ab15-6a83c60406f1n%40googlegroups.com?utm_medium=email&utm_source=footer <https://groups.google.com/d/msgid/jgroups-dev/4e5e066d-a2b3-44bb-ab15-6a83c60406f1n%40googlegroups.com?utm_medium=email&utm_source=footer>>.
>
> --
> Bela Ban | http://www.jgroups.org <http://www.jgroups.org>
have 58 threads in BLOCKED state waiting to lock <0x6f4dcd31>, e.g.:
"jgroups-11402,mss-site,sero-nfsorch-1-f13-97" #12477 prio=0 tid=0x30bd
nid=NA blocked
java.lang.Thread.State: BLOCKED
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.onNewView(SingleTargetRequest.java:56)
#011- waiting to lock <0x6f4dcd31> (a
org.infinispan.remoting.transport.impl.SingleResponseCollector)
That lock is held by thread jgroups-11397:
"jgroups-11397,mss-site,sero-nfsorch-1-f13-97" #12471 prio=0 tid=0x30b7
nid=NA runnable
java.lang.Thread.State: RUNNABLE#011at
java...@11.0.12/sun.util.locale.BaseLocale.hashCode(BaseLocale.java:148)
#011at java...@11.0.12/java.util.Locale.hashCode(Locale.java:2103)
#011at
java...@11.0.12/java.util.concurrent.ConcurrentHashMap.get(ConcurrentHashMap.java:936)
#011at
java...@11.0.12/sun.util.locale.provider.LocaleProviderAdapter.getAdapter(LocaleProviderAdapter.java:241)
#011at
java...@11.0.12/java.text.DecimalFormatSymbols.getInstance(DecimalFormatSymbols.java:178)
#011at java...@11.0.12/java.util.Formatter.getZero(Formatter.java:2437)
#011at java...@11.0.12/java.util.Formatter.<init>(Formatter.java:1956)
#011at java...@11.0.12/java.util.Formatter.<init>(Formatter.java:2011)
#011at java...@11.0.12/java.lang.String.format(String.java:2938)
#011at
app//org.infinispan.util.logging.Log_$logger.remoteNodeSuspected(Log_$logger.java:1970)
#011at
app//org.infinispan.remoting.transport.ResponseCollectors.remoteNodeSuspected(ResponseCollectors.java:31)
#011at
app//org.infinispan.remoting.transport.impl.SingleResponseCollector.targetNotFound(SingleResponseCollector.java:31)
#011at
app//org.infinispan.remoting.transport.impl.SingleResponseCollector.targetNotFound(SingleResponseCollector.java:17)
#011at
app//org.infinispan.remoting.transport.ValidSingleResponseCollector.addResponse(ValidSingleResponseCollector.java:23)
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.addResponse(SingleTargetRequest.java:74)
#011at
app//org.infinispan.remoting.transport.impl.SingleTargetRequest.onResponse(SingleTargetRequest.java:44)
#011- locked <0x6f4dcd31> (a
org.infinispan.remoting.transport.impl.SingleResponseCollector)
#011at
app//org.infinispan.remoting.transport.impl.RequestRepository.addResponse(RequestRepository.java:51)
This thread is in RUNNABLE state, but I suspect that the
Log.remoteNodeSuspected() statement is taking quite a while, so that the
thread pool increases to 100, and thus the thread dump by JGroups (as a
warning).
So this might be a temporary spike, but I recommend looking into how
long the above log method takes, so that it has other threads queuing up
for the <0x6f4dcd31> lock.
>
> --
> Bela Ban | http://www.jgroups.org <http://www.jgroups.org>
>
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