[JBoss Remoting] - Possible bug in "org.jboss.ejb.client.EjbClientContext"
Sunil Dixit <[email protected]> Thu, 22 Aug 2013 08:10:17 -0400
| Newsgroups | gmane.comp.java.jboss.user |
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| Message-ID | <[email protected]> |
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Sunil Dixit [https://community.jboss.org/people/sunil_dixit] created the di=
scussion
"Possible bug in "org.jboss.ejb.client.EjbClientContext""
To view the discussion, visit: https://community.jboss.org/message/833533#8=
33533
--------------------------------------------------------------
jboss-ejb-client (*Version 1.0.18.Final and above*) has one bug (garbage co=
llection related) in "*public void unregisterEJBReceiver(final EJBReceiver =
receiver)*" API.
This API uses "ExecutorService" to send close notification to registered li=
steners (if any) asynchronously.=20
Now if your InitialContext is eligible for garbage collection then it JVM c=
alls RemoteContext.finalize() method which internally result into calling "=
*org.jboss.ejb.client.EJBReceiverContext.close()*" which triggers
"*org.jboss.ejb.client.EJBClientContext.unregisterEJBReceiver()*" .
Before "*org.jboss.ejb.client.EJBClientContext.unregisterEJBReceiver() "* g=
ets executed "*org.jboss.ejb.client.EJBClientContext.ejbClientContextTasksE=
xecutorService*" state is changed from RUNNING to TERMINATED i.e. ( runStat=
e is being set to 3) which result into "java.util.concurrent.RejectedExecut=
ionException".=20
T*hreadPoolExecutor.addIfUnderMaximumPoolSize() API will always return fals=
e as " if (poolSize < maximumPoolSize && runState =3D=3D RUNNING)" prevents=
to create new thread*.
Finally caller APIs gets following exception
java.util.concurrent.RejectedExecutionException
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPo=
olExecutor$AbortPolicy.rejectedExecution(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPo=
olExecutor.reject(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.ThreadPo=
olExecutor.execute(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.util.concurrent.Abstract=
ExecutorService.submit(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.EJBClien=
tContext.unregisterEJBReceiver(EJBClientContext.java:432)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.EJBRecei=
verContext.close(EJBReceiverContext.java:59)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.remoting=
.ChannelAssociation.notifyBrokenChannel(ChannelAssociation.java:404)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.remoting=
.ChannelAssociation.access$100(ChannelAssociation.java:59)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.remoting=
.ChannelAssociation$1.handleClose(ChannelAssociation.java:118)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.ejb.client.remoting=
.ChannelAssociation$1.handleClose(ChannelAssociation.java:110)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.SpiUt=
ils.safeHandleClose(SpiUtils.java:54)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable$CloseHandlerTask.run(AbstractHandleableCloseable.jav=
a:501)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable.runCloseTask(AbstractHandleableCloseable.java:406)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable.closeComplete(AbstractHandleableCloseable.java:277)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.remote.Re=
moteConnectionChannel.closeAction(RemoteConnectionChannel.java:515)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable.closeAsync(AbstractHandleableCloseable.java:359)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.remote.Re=
moteConnectionHandler.closeAllChannels(RemoteConnectionHandler.java:390)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.remote.Re=
moteConnectionHandler.sendCloseRequest(RemoteConnectionHandler.java:231)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.remote.Re=
moteConnectionHandler.closeAction(RemoteConnectionHandler.java:376)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable.closeAsync(AbstractHandleableCloseable.java:359)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.Connectio=
nImpl.closeAction(ConnectionImpl.java:52)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.remoting3.spi.Abstr=
actHandleableCloseable.closeAsync(AbstractHandleableCloseable.java:359)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.naming.remote.clien=
t.HaRemoteNamingStore.closeAsync(HaRemoteNamingStore.java:385)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.naming.remote.clien=
t.NamingStoreCache.release(NamingStoreCache.java:113)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.naming.remote.clien=
t.NamingStoreCache$1.close(NamingStoreCache.java:98)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at org.jboss.naming.remote.clien=
t.RemoteContext.finalize(RemoteContext.java:199)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.ref.Finalizer.invok=
eFinalizeMethod(Native Method)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.ref.Finalizer.runFi=
nalizer(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.ref.Finalizer.acces=
s$100(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 at java.lang.ref.Finalizer$Final=
izerThread.run(Unknown Source)
=C2=A0=C2=A0=C2=A0=C2=A0 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0Below code in "org.j=
boss.ejb.client.EJBClientContext" is added into new versions and causing th=
is problem
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 // we *don't* want to send these notification to listeners =
synchronously since the listeners can be any arbitrary
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 // application code and can potential block for a long time=
. So invoke the listeners asynchronously via our ExecutorService
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 final Collection<EJBClientContextListener> listeners =3D ne=
w ArrayList<EJBClientContextListener>(this.ejbClientContextListeners);
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 for (final EJBClientContextListener listener : listeners) {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 this.ejbClientContextTasksExecutorS=
ervice.submit(new Runnable() {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 @Override
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 public void=
run() {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 try {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 listener.receiverUnRegistered(receiver=
Context);
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 } catch (Throwable t) {
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 // log and ignore
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 logger.debug("Exception trying to invo=
ke EJBClientContextListener " + listener + " for EJB client context " + EJB=
ClientContext.this + " on un-registertation of EJBReceiver " + receiver, t)=
;
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0 }
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 });
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0=C2=A0 }
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 }
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Possible bug in "org.jboss.ejb.client.EjbClientContext"
</h3>
<span style=3D"margin-bottom: 10px;">
created by <a href=3D"https://community.jboss.org/people/sunil_dixit">S=
unil Dixit</a> in <i>JBoss Remoting</i> - <a href=3D"https://community.jbos=
s.org/message/833533#833533">View the full discussion</a>
</span>
<hr style=3D"margin: 20px 0; border: none; background-color: #dadada; heigh=
t: 1px;">
<div class=3D"jive-rendered-content"><p>jboss-ejb-client (<span style=3D"te=
xt-decoration: underline;"><strong>Version 1.0.18.Final and above</strong><=
/span>) has one bug (garbage collection related) in "<span style=3D"font-si=
ze: 12pt;"><strong>public void unregisterEJBReceiver(final EJBReceiver rece=
iver)</strong></span>" API.</p><p style=3D"min-height: 8pt; height: 8pt; pa=
dding: 0px;"> </p><p>This API uses "ExecutorService" to send close not=
ification to registered listeners (if any) asynchronously. </p><p>Now if yo=
ur InitialContext is eligible for garbage collection then it JVM calls Remo=
teContext.finalize() method which internally result into calling "<span sty=
le=3D"font-size: 12pt;"><strong>org.jboss.ejb.client.EJBReceiverContext.clo=
se()</strong></span>" which triggers</p><p>"<span style=3D"font-size: 12pt;=
"><strong>org.jboss.ejb.client.EJBClientContext.unregisterEJBReceiver()</st=
rong></span>" .</p><p style=3D"min-height: 8pt; height: 8pt; padding: 0px;"=
> </p><p>Before "<span style=3D"font-size: 12pt;"><strong>org.jboss.ej=
b.client.EJBClientContext.unregisterEJBReceiver() " </strong></span>gets ex=
ecuted "<span style=3D"font-size: 12pt;"><strong>org.jboss.ejb.client.EJBCl=
ientContext.<span style=3D"color: #0000ff;">ejbClientContextTasksExecutorSe=
rvice</span></strong></span>" state is changed from RUNNING to TERMINATED i=
.e. ( runState is being set to 3) which result into "<span style=3D"font-si=
ze: 12pt;">java.util.concurrent.RejectedExecutionException</span>". </p><p =
style=3D"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style=3D=
"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><span style=3D"c=
olor: #333333;"><span style=3D"font-size: 12pt;">T<strong>hreadPoolExecutor=
.addIfUnderMaximumPoolSize() API will always return false as " if (poolSize=
< maximumPoolSize && runState =3D=3D RUNNING)" prevents to crea=
te new thread</strong></span>.</span></p><p style=3D"min-height: 8pt; heigh=
t: 8pt; padding: 0px;"> </p><p style=3D"min-height: 8pt; height: 8pt; =
padding: 0px;"> </p><p>Finally caller APIs gets following exception</p=
><p style=3D"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p styl=
e=3D"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>java.util.co=
ncurrent.RejectedExecutionException</p><p>     =
60;  at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedEx=
ecution(Unknown Source)</p><p>        at=
java.util.concurrent.ThreadPoolExecutor.reject(Unknown Source)</p><p> =
;       at java.util.concurrent.ThreadPoolExe=
cutor.execute(Unknown Source)</p><p>      =
60; at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)<=
/p><p>        at org.jboss.ejb.client.EJ=
BClientContext.unregisterEJBReceiver(EJBClientContext.java:432)</p><p> =
;       at org.jboss.ejb.client.EJBReceiverCo=
ntext.close(EJBReceiverContext.java:59)</p><p>     =
;   at org.jboss.ejb.client.remoting.ChannelAssociation.notifyBro=
kenChannel(ChannelAssociation.java:404)</p><p>     =
;   at org.jboss.ejb.client.remoting.ChannelAssociation.access$10=
0(ChannelAssociation.java:59)</p><p>      =
60; at org.jboss.ejb.client.remoting.ChannelAssociation$1.handleClose(Chann=
elAssociation.java:118)</p><p>        at=
org.jboss.ejb.client.remoting.ChannelAssociation$1.handleClose(ChannelAsso=
ciation.java:110)</p><p>        at org.j=
boss.remoting3.spi.SpiUtils.safeHandleClose(SpiUtils.java:54)</p><p> &=
#160;      at org.jboss.remoting3.spi.AbstractHand=
leableCloseable$CloseHandlerTask.run(AbstractHandleableCloseable.java:501)<=
/p><p>        at org.jboss.remoting3.spi=
.AbstractHandleableCloseable.runCloseTask(AbstractHandleableCloseable.java:=
406)</p><p>        at org.jboss.remoting=
3.spi.AbstractHandleableCloseable.closeComplete(AbstractHandleableCloseable=
.java:277)</p><p>        at org.jboss.re=
moting3.remote.RemoteConnectionChannel.closeAction(RemoteConnectionChannel.=
java:515)</p><p>        at org.jboss.rem=
oting3.spi.AbstractHandleableCloseable.closeAsync(AbstractHandleableCloseab=
le.java:359)</p><p>        at org.jboss.=
remoting3.remote.RemoteConnectionHandler.closeAllChannels(RemoteConnectionH=
andler.java:390)</p><p>        at org.jb=
oss.remoting3.remote.RemoteConnectionHandler.sendCloseRequest(RemoteConnect=
ionHandler.java:231)</p><p>        at or=
g.jboss.remoting3.remote.RemoteConnectionHandler.closeAction(RemoteConnecti=
onHandler.java:376)</p><p>        at org=
.jboss.remoting3.spi.AbstractHandleableCloseable.closeAsync(AbstractHandlea=
bleCloseable.java:359)</p><p>        at =
org.jboss.remoting3.ConnectionImpl.closeAction(ConnectionImpl.java:52)</p><=
p>        at org.jboss.remoting3.spi.Abs=
tractHandleableCloseable.closeAsync(AbstractHandleableCloseable.java:359)</=
p><p>        at org.jboss.naming.remote.=
client.HaRemoteNamingStore.closeAsync(HaRemoteNamingStore.java:385)</p><p>&=
#160;       at org.jboss.naming.remote.client=
.NamingStoreCache.release(NamingStoreCache.java:113)</p><p>  =
0;     at org.jboss.naming.remote.client.NamingStoreCac=
he$1.close(NamingStoreCache.java:98)</p><p>     &#=
160;  at org.jboss.naming.remote.client.RemoteContext.finalize(RemoteC=
ontext.java:199)</p><p>        at java.l=
ang.ref.Finalizer.invokeFinalizeMethod(Native Method)</p><p>  =
60;     at java.lang.ref.Finalizer.runFinalizer(Unknown=
Source)</p><p>        at java.lang.ref.=
Finalizer.access$100(Unknown Source)</p><p>     &#=
160;  at java.lang.ref.Finalizer$FinalizerThread.run(Unknown Source)</=
p><p style=3D"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p sty=
le=3D"min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style=3D"mi=
n-height: 8pt; height: 8pt; padding: 0px;"> </p><p style=3D"min-height=
: 8pt; height: 8pt; padding: 0px;"> </p><p>     &#=
160;    Below code in "org.jboss.ejb.client.EJBClientCo=
ntext" is added into new versions and causing this problem</p><p style=3D"m=
in-height: 8pt; height: 8pt; padding: 0px;"> </p><p style=3D"min-heigh=
t: 8pt; height: 8pt; padding: 0px;"> </p><p>    &#=
160;           // we *don=
't* want to send these notification to listeners synchronously since the li=
steners can be any arbitrary</p><p>      =
0;         // application code and =
can potential block for a long time. So invoke the listeners asynchronously=
via our ExecutorService</p><p>       &#=
160;        final Collection<EJBClien=
tContextListener> listeners =3D new ArrayList<EJBClientContextListene=
r>(this.ejbClientContextListeners);</p><p>     =
           for (final EJB=
ClientContextListener listener : listeners) {</p><p>    =
;            &#=
160;   this.ejbClientContextTasksExecutorService.submit(new Runna=
ble() {</p><p>          &=
#160;           =
0; @Override</p><p>         &#=
160;            =
;  public void run() {</p><p>       =
;            &#=
160;        try {</p><p>  =
0;            &=
#160;           =
0;    listener.receiverUnRegistered(receiverContext);</p><p>=
            =
60;            =
   } catch (Throwable t) {</p><p>     &#=
160;            =
;            &#=
160; // log and ignore</p><p>       =
0;            &=
#160;           logger.de=
bug("Exception trying to invoke EJBClientContextListener " + listener + " f=
or EJB client context " + EJBClientContext.this + " on un-registertation of=
EJBReceiver " + receiver, t);</p><p>      &#=
160;            =
;         }</p><p>   =
;            &#=
160;        }</p><p>   &#=
160;            =
;    });</p><p>       =
60;        }</p><p>   =
60;        }</p></div>
<div style=3D"background-color: #f4f4f4; padding: 10px; margin-top: 20px;">
<p style=3D"margin: 0;">Reply to this message by <a href=3D"https://com=
munity.jboss.org/message/833533#833533">going to Community</a></p>
=09<p style=3D"margin: 0;">Start a new discussion in JBoss Remoting at <a h=
ref=3D"https://community.jboss.org/choose-container!input.jspa?contentType=
=3D1&containerType=3D14&container=3D2050">Community</a></p>
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