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Posted to dev@thrift.apache.org by "Xiangdong Huang (Jira)" <ji...@apache.org> on 2020/04/16 11:01:00 UTC
[jira] [Closed] (THRIFT-5175) Maybe a race condition in
TThreadedServerPool java implementation
[ https://issues.apache.org/jira/browse/THRIFT-5175?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangdong Huang closed THRIFT-5175.
-----------------------------------
Resolution: Not A Problem
Hi,
I have checked the codes, it is because close() is called before calling TThreadPoolServer.serve().
> Maybe a race condition in TThreadedServerPool java implementation
> -----------------------------------------------------------------
>
> Key: THRIFT-5175
> URL: https://issues.apache.org/jira/browse/THRIFT-5175
> Project: Thrift
> Issue Type: Bug
> Components: Java - Library
> Affects Versions: 0.13.0
> Reporter: Xiangdong Huang
> Priority: Major
> Attachments: image-2020-04-16-10-36-00-871.png, log.log
>
>
> Hi,
> I notice THRIFT-1795 https://issues.apache.org/jira/browse/THRIFT-1795 solves a problem of the race condition in TThreadedServerPool.
>
> However , now when I use Thrift v0.13.0, I occur the same problem..
>
> Some codes:
> The poolServer is TThreadPoolServer.
> The serverTransport is TServerSocket.
> I have a thread to run poolServer.serve().
> And, another thread will call the following close() method to close the thrift.
>
> {code:java}
> // code placeholder
> private synchronized void close() {
> if (poolServer != null) {
> poolServer.stop();
> poolServer = null;
> }
> if (serverTransport != null) {
> serverTransport.close();
> serverTransport = null;
> }
> }
> {code}
>
>
>
> Then, after calling the above close() method, the console will print:
>
> {code:java}
> // code placeholder
> WARN [2020-04-16 02:14:46,097] [RPC-ServerServiceImpl] org.apache.thrift.server.TThreadPoolServer:230 - Transport error occurred during acceptance of message.
> org.apache.thrift.transport.TTransportException: No underlying server socket.
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:126)
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:35)
> at org.apache.thrift.transport.TServerTransport.accept(TServerTransport.java:60)
> at org.apache.thrift.server.TThreadPoolServer.execute(TThreadPoolServer.java:185)
> at org.apache.thrift.server.TThreadPoolServer.serve(TThreadPoolServer.java:175)
> at org.apache.iotdb.db.service.RPCService$RPCServiceThread.run(RPCService.java:219)
> WARN [2020-04-16 02:14:46,103] [RPC-ServerServiceImpl] org.apache.thrift.server.TThreadPoolServer:230 - Transport error occurred during acceptance of message.
> org.apache.thrift.transport.TTransportException: No underlying server socket.
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:126)
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:35)
> at org.apache.thrift.transport.TServerTransport.accept(TServerTransport.java:60)
> at org.apache.thrift.server.TThreadPoolServer.execute(TThreadPoolServer.java:185)
> at org.apache.thrift.server.TThreadPoolServer.serve(TThreadPoolServer.java:175)
> at org.apache.iotdb.db.service.RPCService$RPCServiceThread.run(RPCService.java:219)
> WARN [2020-04-16 02:14:46,105] [RPC-ServerServiceImpl] org.apache.thrift.server.TThreadPoolServer:230 - Transport error occurred during acceptance of message.
> org.apache.thrift.transport.TTransportException: No underlying server socket.
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:126)
> at org.apache.thrift.transport.TServerSocket.acceptImpl(TServerSocket.java:35)
> at org.apache.thrift.transport.TServerTransport.accept(TServerTransport.java:60)
> at org.apache.thrift.server.TThreadPoolServer.execute(TThreadPoolServer.java:185)
> at org.apache.thrift.server.TThreadPoolServer.serve(TThreadPoolServer.java:175)
> at org.apache.iotdb.db.service.RPCService$RPCServiceThread.run(RPCService.java:219)
> {code}
> This exception repeats infinitely.
>
>
> The issues is hard to be reproduced on my MacOS, but can be reproduced on Travis-CI, in some environments (Linux-openjdk11, linux-openjdk8, win-openjdk11):
> !image-2020-04-16-10-36-00-871.png|width=1178,height=413!
> I attached a log file here (but maybe it can not give you more info).
>
> I read the source code and feel that it is very strange. Thrift has marked the stopped_ field as volatile, I do not know why the execute() method of TThreadPoolServer does not break out the loop.
>
>
>
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