[
https://issues.apache.org/jira/browse/HTTPASYNC-16?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Oleg Kalnichevski resolved HTTPASYNC-16.
----------------------------------------
Resolution: Invalid
It looks like this is not a deadlock in HttpAsyncClient code but rather a
synchronization problem in the application code.
Judging by the tread dump what is likely to be happening is that:
AbstractNIOConnPool detects a timed out connection request and tries to notify
the caller by invoking the failed() method of the future callback. The callback
implementation starts a Hibernate transaction which gets blocked somewhere deep
down on the BasicResourcePool class waiting for a resource to become available.
The callback never returns. The pool remains locked.
Oleg
"I/O dispatcher 251" prio=10 tid=0x0000000002097800 nid=0x12e5 in Object.wait()
[0x00007f234079c000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000e6bbd210> (a
com.mchange.v2.resourcepool.BasicResourcePool)
at
com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1315)
...
at org.hibernate.ejb.TransactionImpl.begin(TransactionImpl.java:57)
at
com.laadhari.musicdb.sing365.MyFutureCallBack.failed(MyFutureCallBack.java:208)
...
at
org.apache.http.impl.nio.client.DefaultResultCallback.failed(DefaultResultCallback.java:52)
at
org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.connectionRequestFailed(DefaultAsyncRequestDirector.java:534)
...
at org.apache.http.concurrent.BasicFuture.failed(BasicFuture.java:122)
...
at
org.apache.http.nio.pool.AbstractNIOConnPool.processPendingRequests(AbstractNIOConnPool.java:244)
...
> DefaultHttpAsyncClient/AbstractHttpAsyncClient shutdown medthod hangs
> ---------------------------------------------------------------------
>
> Key: HTTPASYNC-16
> URL: https://issues.apache.org/jira/browse/HTTPASYNC-16
> Project: HttpComponents HttpAsyncClient
> Issue Type: Bug
> Affects Versions: 4.0-beta2
> Environment: JAVA 7 linux ubuntu 2.6.32-23
> Reporter: LAADHARI saber
> Attachments: ThreadsStack.txt
>
> Original Estimate: 1h
> Remaining Estimate: 1h
>
> the shutdown methode hangs sometime indefinitely.
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