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Re: [jetty-users] Getting a java.util.concurrent.RejectedExecutionException

​The Java Version is OpenJDK 1.6.0_27

The App is running on Heroku and uses Ubuntu 10.04

Jetty is running embedded, and the ExecutorThreadPool is being invoked with the following parameters:



keepAliveTime=5000 ms

The LinkedBlockingQueue that is passed to the ExecutorThreadPool has a capacity of 20.


From: jetty-users-bounces@xxxxxxxxxxx <jetty-users-bounces@xxxxxxxxxxx> on behalf of Joakim Erdfelt <joakim@xxxxxxxxxxx>
Sent: Tuesday, September 30, 2014 4:01 PM
To: JETTY user mailing list
Subject: Re: [jetty-users] Getting a java.util.concurrent.RejectedExecutionException
What specific version of Java 1.6? (some versions of Java 1.6 have problems)
On what environment/platform/OS? (some platforms have shown problems)
Also, what are your threadpool settings? (low threadpool settings can cause problems)

Joakim Erdfelt <joakim@xxxxxxxxxxx>
Expert advice, services and support from from the Jetty & CometD experts

On Tue, Sep 30, 2014 at 12:46 PM, Jeff Smyth <jds@xxxxxxxxxxxx> wrote:
Jetty Users Group,

I have recently been facing an issue with my Production Server which runs on Jetty. I hope this is the correct location to ask for assistance. The following is the error that is being thrown:

app/web.4: 2014-09-30 03:42:36,794 [pool-2-thread-1 Selector0] WARN - Dispatched Failed! SCEP@5ebab0e9{l(/<->r(/,s=-1,open=true,ishut=false,oshut=false,rb=false,wb=false,w=true,i=1r}-{AsyncHttpConnection@32b4c195,g=HttpGenerator{s=0,h=-1,b=-1,c=-1},p=HttpParser{s=-14,l=0,c=0},r=0} to org.eclipse.jetty.server.nio.SelectChannelConnector$ConnectorSelectorManager@45544e03

app/web.4: 2014-09-30 03:42:36,794 [pool-2-thread-1 Selector0] WARN org.eclipse.jetty.util.thread.ExecutorThreadPool -
app/web.4: java.util.concurrent.RejectedExecutionException
app/web.4:  at java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(
app/web.4:  at org.eclipse.jetty.server.nio.SelectChannelConnector$ConnectorSelectorManager.dispatch(
app/web.4:  at
app/web.4:  at
app/web.4:  at$SelectSet.doSelect(
app/web.4:  at$
app/web.4:  at java.util.concurrent.ThreadPoolExecutor.runWorker(
app/web.4:  at java.util.concurrent.ThreadPoolExecutor$
app/web.4:  at

This error spits out over 100 times a second. When the server is brought up, it runs fine for about 4-8 hours until this error starts showing, and the application is soon unresponsive.

The application runs on a Heroku server, it is on Java 1.6, using Jetty Version 7.6.16.v20140903

I also found this (seemingly) related bug: , however, since I am using Jetty 1.6 I am not using an affected version.

Any help or insight into what may be causing this issue would be appreciated.


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