Add error handling option for UIMA AS services accessed by core UIMA
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Key: UIMA-1794
URL: https://issues.apache.org/jira/browse/UIMA-1794
Project: UIMA
Issue Type: New Feature
Components: Async Scaleout
Reporter: Eddie Epstein
Assignee: Eddie Epstein
Priority: Minor
A core UIMA analysis engine has no error handling. Exceptions are passed back
to the caller. Remote services accessed from a core aggregate AE add a timeout
option which will generate a timeout exception.
Marshall has a scenario where a scaled out UIMA aggregate AE running as a
hadoop mapper has a remote delegate. This delegate is implemented as a UIMA AS
service, accessed via a JMS client descriptor. In extremely rare cases the
remote service takes too long to finish processing.
In order for the hadoop job to complete successfully, Marshall would like a
"continue on failure" option, where after a timeout the error is ignored and
the original CAS sent to the remote service is used to continue processing in
the core UIMA aggregate. This option is easy to implement with UIMA AS
services, because a copy of the outstanding CAS is held by the client.
The syntax would be to add an optional argument to the JMS client descriptor,
e.g.
<parameter name="ignore_process_errors" value="true"/>
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