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Posted to dev@qpid.apache.org by "Rob Godfrey (JIRA)" <ji...@apache.org> on 2015/11/17 21:31:10 UTC
[jira] [Assigned] (QPID-6862) IoReceiver thread using CPU even when
there are no messages moving
[ https://issues.apache.org/jira/browse/QPID-6862?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rob Godfrey reassigned QPID-6862:
---------------------------------
Assignee: Rob Godfrey
> IoReceiver thread using CPU even when there are no messages moving
> ------------------------------------------------------------------
>
> Key: QPID-6862
> URL: https://issues.apache.org/jira/browse/QPID-6862
> Project: Qpid
> Issue Type: Bug
> Components: Java Broker
> Affects Versions: 0.32
> Environment: Qpid 0.32
> OpenJDK Runtime Environment (build 1.8.0_65-b17)
> Red Hat Enterprise Linux Server release 6.7 (Santiago)
> Reporter: Mark Soderquist
> Assignee: Rob Godfrey
> Attachments: QPID-6862.diff
>
>
> On our Qpid server we have roughly 25 connections to the server. The traffic over these connections is very light (1 msg/5 mins). However, the IoReceiver threads are constantly using around 3% CPU each, causing approximately 75% CPU use. We don't understand why the IoReceiver threads are using CPU when there are very few messages moving. Here is a stack trace of one of the IoReceiver threads:
> Stack Trace
> IoReceiver - /10.118.252.6:59297 [169442] (RUNNABLE)
> java.net.SocketInputStream.socketRead0 line: not available [native method]
> java.net.SocketInputStream.socketRead line: 116
> java.net.SocketInputStream.read line: 170
> java.net.SocketInputStream.read line: 141
> sun.security.ssl.InputRecord.readFully line: 465
> sun.security.ssl.InputRecord.read line: 503
> sun.security.ssl.SSLSocketImpl.readRecord line: 973
> sun.security.ssl.SSLSocketImpl.readDataRecord line: 930
> sun.security.ssl.AppInputStream.read line: 105
> org.apache.qpid.transport.network.io.IoReceiver.run line: 156
> java.lang.Thread.run line: 745
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