hc-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Scott Stanton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HTTPCORE-334) https request to a non-responsive but alive port results in a busy loop in one thread
Date Tue, 19 Feb 2013 23:23:13 GMT

     [ https://issues.apache.org/jira/browse/HTTPCORE-334?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Scott Stanton updated HTTPCORE-334:
-----------------------------------

    Attachment: HTTPCORE-334.patch
    
> https request to a non-responsive but alive port results in a busy loop in one thread
> -------------------------------------------------------------------------------------
>
>                 Key: HTTPCORE-334
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-334
>             Project: HttpComponents HttpCore
>          Issue Type: Bug
>          Components: HttpCore NIO
>    Affects Versions: 4.2.4
>         Environment: Windows 8 64-bit
> JDK 1.7.0_11
>            Reporter: Scott Stanton
>         Attachments: HTTPCORE-334.patch
>
>
> Steps to reproduce:
> * Start a process that listens on a socket, accepts the connection, but does not read
any data
> * In a second processs, establish an https connection 
> At this point, one reactor thread will go into a busy loop getting writable events but
not writing any data.  As far as I can tell, this continues indefinitely until either the
client or the server closes the port.  Ideally this scenario would result in no cpu overhead
as the selector should only be waiting for read events if it doesn't have any data to write.
 Eventually it should hit an idle timeout so the client can recover from a non responsive
server.
> Here is a stack snapshot for the busy thread:
> Agent-003 [RUNNABLE, IN_NATIVE] CPU time: 39s
> com.yourkit.probes.Table.createRow()
> com.yourkit.probes.Table.createRow(int)
> com.yourkit.probes.builtin.Sockets$SocketChannel_write_Probe.onEnter(SocketChannel)
> sun.nio.ch.SocketChannelImpl.write(ByteBuffer)
> org.apache.http.nio.reactor.ssl.SSLIOSession.sendEncryptedData()
> org.apache.http.nio.reactor.ssl.SSLIOSession.outboundTransport()
> org.apache.http.impl.nio.reactor.AbstractIODispatch.outputReady(IOSession)
> org.apache.http.impl.nio.reactor.BaseIOReactor.writable(SelectionKey)
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvent(SelectionKey)
> org.apache.http.impl.nio.reactor.AbstractIOReactor.processEvents(Set)
> org.apache.http.impl.nio.reactor.AbstractIOReactor.execute()
> org.apache.http.impl.nio.reactor.BaseIOReactor.execute(IOEventDispatch)
> org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run()
> java.lang.Thread.run()
> com.electriccloud.util.EcThread.run()

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@hc.apache.org
For additional commands, e-mail: dev-help@hc.apache.org


Mime
View raw message