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From "Fei Sun (Jira)" <j...@apache.org>
Subject [jira] [Updated] (THRIFT-4963) TNonblockingServer blocked int addTask(IOThread) and notify(workerThread)
Date Mon, 30 Sep 2019 09:41:00 GMT

     [ https://issues.apache.org/jira/browse/THRIFT-4963?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Fei Sun updated THRIFT-4963:
----------------------------
    Attachment: deadlock_thread.png

> TNonblockingServer blocked int addTask(IOThread) and notify(workerThread)
> -------------------------------------------------------------------------
>
>                 Key: THRIFT-4963
>                 URL: https://issues.apache.org/jira/browse/THRIFT-4963
>             Project: Thrift
>          Issue Type: Bug
>          Components: C++ - Library
>    Affects Versions: 0.12.0
>            Reporter: chenguang9239
>            Priority: Major
>         Attachments: CppClient.cpp, CppServer.cpp, deadlock_thread.png
>
>
> hello!
> when using c++ TNonblockingServer(with thread pool),I found it blocked in high QPS
status.
> I used pstack to print thread stack and found worker thread and IO thread blocked at:
> The worker thread will call notifyIOThread when it handle expired task, then call TNonblockingIOThread::notify
and wait for POLLOUT in poll without timeout. 
> The IO thread will call addTask when it gets requests. And IO threads will lock threadManager->mutex_
in addTask without a timeout
> Is it a bug of thrift 0.12.0?



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