[HTTPASYNC-18] Create multiple client object will deadlock

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 4.0-beta1
• Fix Version/s: 4.0-beta2
• Environment: Windows 7
• Assignee: Unassigned
• Reporter: zhaoqz
• Created: 20/Apr/12 08:38
• Updated: 22/Apr/12 11:52
• Resolved: 22/Apr/12 11:52

Description

Found one Java-level deadlock:
=============================
"I/O dispatcher 20":
waiting to lock monitor 0x0fc87f4c (object 0x299028b8, a org.apache.http.impl.nio.client.DefaultAsyncRequestDirector),
which is held by "I/O dispatcher 18"
"I/O dispatcher 18":
waiting to lock monitor 0x03fd6cfc (object 0x2b2d57b8, a org.apache.http.concurrent.BasicFuture),
which is held by "I/O dispatcher 20"

Java stack information for the threads listed above:
===================================================
"I/O dispatcher 20":
at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.connectionRequestCompleted(DefaultAsyncRequestDirector.java:508)

• waiting to lock <0x299028b8> (a org.apache.http.impl.nio.client.DefaultAsyncRequestDirector)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.access$000(DefaultAsyncRequestDirector.java:92)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector$InternalFutureCallback.completed(DefaultAsyncRequestDirector.java:552)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector$InternalFutureCallback.completed(DefaultAsyncRequestDirector.java:549)
  at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:109)
• locked <0x2b2d57b8> (a org.apache.http.concurrent.BasicFuture)
  at org.apache.http.impl.nio.conn.PoolingClientAsyncConnectionManager$InternalPoolEntryCallback.completed(PoolingClientAsyncConnectionManager.java:303)
  at org.apache.http.impl.nio.conn.PoolingClientAsyncConnectionManager$InternalPoolEntryCallback.completed(PoolingClientAsyncConnectionManager.java:285)
  at org.apache.http.concurrent.BasicFuture.completed(BasicFuture.java:109)
• locked <0x2b2d57e0> (a org.apache.http.concurrent.BasicFuture)
  at org.apache.http.nio.pool.RouteSpecificPool.completed(RouteSpecificPool.java:154)
  at org.apache.http.nio.pool.AbstractNIOConnPool.requestCompleted(AbstractNIOConnPool.java:349)
  at org.apache.http.nio.pool.AbstractNIOConnPool$InternalSessionRequestCallback.completed(AbstractNIOConnPool.java:581)
  at org.apache.http.impl.nio.reactor.SessionRequestImpl.completed(SessionRequestImpl.java:130)
• locked <0x2b2d5818> (a org.apache.http.impl.nio.reactor.SessionRequestImpl)
  at org.apache.http.impl.nio.reactor.AbstractIOReactor.processNewChannels(AbstractIOReactor.java:424)
  at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:291)
  at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
  at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:601)
  at java.lang.Thread.run(Unknown Source)
  "I/O dispatcher 18":
  at org.apache.http.concurrent.BasicFuture.cancel(BasicFuture.java:129)
• waiting to lock <0x2b2d57b8> (a org.apache.http.concurrent.BasicFuture)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.releaseResources(DefaultAsyncRequestDirector.java:368)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.failed(DefaultAsyncRequestDirector.java:393)
• locked <0x299028b8> (a org.apache.http.impl.nio.client.DefaultAsyncRequestDirector)
  at org.apache.http.impl.nio.client.DefaultAsyncRequestDirector.responseCompleted(DefaultAsyncRequestDirector.java:467)
• locked <0x299028b8> (a org.apache.http.impl.nio.client.DefaultAsyncRequestDirector)
  at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.processResponse(HttpAsyncRequestExecutor.java:384)
  at org.apache.http.nio.protocol.HttpAsyncRequestExecutor.inputReady(HttpAsyncRequestExecutor.java:268)
  at org.apache.http.impl.nio.client.LoggingAsyncRequestExecutor.inputReady(LoggingAsyncRequestExecutor.java:99)
  at org.apache.http.impl.nio.DefaultNHttpClientConnection.consumeInput(DefaultNHttpClientConnection.java:192)
  at org.apache.http.impl.nio.DefaultHttpClientIODispatch.onInputReady(DefaultHttpClientIODispatch.java:125)
  at org.apache.http.impl.nio.DefaultHttpClientIODispatch.onInputReady(DefaultHttpClientIODispatch.java:49)
  at org.apache.http.impl.nio.reactor.AbstractIODispatch.inputReady(AbstractIODispatch.java:112)
  at org.apache.http.impl.nio.reactor.BaseIOReactor.readable(BaseIOReactor.java:160)
  at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(AbstractIOReactor.java:342)
  at org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(AbstractIOReactor.java:320)
  at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:280)
  at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:106)
  at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:601)
  at java.lang.Thread.run(Unknown Source)

Found 2 deadlocks.