[jira] [Resolved] (STORM-442) multilang ShellBolt/ShellSpout die() can be hang when Exception happened

["Robert Joseph Evans (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/STORM-442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Robert Joseph Evans resolved STORM-442.
---------------------------------------
       Resolution: Fixed
    Fix Version/s: 0.10.0
         Assignee: DashengJu

Thanks [~dashengju],

I merged this into master.

> multilang ShellBolt/ShellSpout die() can be hang when Exception happened
> ------------------------------------------------------------------------
>
>                 Key: STORM-442
>                 URL: https://issues.apache.org/jira/browse/STORM-442
>             Project: Apache Storm
>          Issue Type: Bug
>    Affects Versions: 0.9.3
>            Reporter: DashengJu
>            Assignee: DashengJu
>             Fix For: 0.10.0
>
>
> In ShellBolt,  the _readerThread read command from python/shell process, and handle like this:
>  try {
>         ShellMsg shellMsg = _process.readShellMsg();
>         ...                
>  } catch (InterruptedException e) {
>  } catch (Throwable t) {
>         die(t);
>  }
> And in the die function, getProcessTerminationInfoString will read getErrorsString() from processErrorStream.
>  private void die(Throwable exception) {
>  
>          String processInfo = _process.getProcessInfoString() + _process.getProcessTerminationInfoString();
>  
>          _exception = new RuntimeException(processInfo, exception);
>  
>  }
> so when ShellBolt got exception(for example, readShellMsg() throw NPE ) ,  but it is not an error from sub process,  then getProcessTerminationInfoString will be hang because processErrorStream have no data to read.
> On the other hand, as [~xiaokang] says ShellBolt should fail fast on exception ( https://github.com/apache/incubator-storm/pull/46 ) , I think it is not a good idea to read error info from stream.
> Because [~xiaokang] 's PR is based old version, so I will move his code to this PR, and modify some other place in ShellSpout.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)