Jerry Cwiklik created UIMA-5119:
-----------------------------------
Summary: UIMA-AS: CPP wrapper fails with Exception on service
shutdown
Key: UIMA-5119
URL: https://issues.apache.org/jira/browse/UIMA-5119
Project: UIMA
Issue Type: Bug
Components: Async Scaleout
Reporter: Jerry Cwiklik
Assignee: Jerry Cwiklik
Fix For: 2.9.0AS
The UimacppServiceManagement code fails when remote C++ service terminates with
the following stack trace:
> UimacppServiceManagement service reports shutdown DONE
> UimacppShutdownHook sending quiesce message
> java.net.SocketException: Socket is closed
> at java.net.Socket.getInputStream(Socket.java:903)
> at
> org.apache.uima.aae.controller.UimacppServiceManagement.
> quiesceAndStop(Uima
> cppServiceManagement.java:88)
> at
> org.apache.uima.aae.controller.UimacppServiceManagement.
> quiesceAndShutdown(
> UimacppServiceManagement.java:397)
> at
> org.apache.uima.aae.controller.UimacppShutdownHook.run(
> UimacppServiceController.java:1105)
The UimacppServiceManagement is a communication wrapper which is used by
UimacppServiceController to interact with a remote C++ process. It sends text
commands to the remote using a Socket.
In quiesceAndStop() the code sends "QUIESCEANDSTOP" command and a remote
process exits immediately. After sending the command, the
UimacppServiceManagement tries to read from a socket that was closed causing
the exception.
Modify code to catch SocketException and log a short message instead of dumping
stack trace and returning an exception. Process terminating quickly should not
be considered an error.
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