Michael Blow has posted comments on this change.

Change subject: Fix QueryCancellationServlet use of e.getMessage()
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Patch Set 1:

> When should/shouldn't we use e.getMessages() for logging?  I think
 > we have logged e.getMessages() in a number of places.

It is OK to use getMessage() when the exception type is well-known to have 
useful messages, e.g. AsterixException & HyracksException, but JVM exceptions 
for example rarely have useful messages out of context of the class, and often 
are null.  e.g. IllegalArgumentException, ArrayIndexOutOfBoundsException, 
NullPointerException

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Gerrit-MessageType: comment
Gerrit-Change-Id: I1f5e2172728d3bc4d0cc4a9990518adcd91ae76b
Gerrit-PatchSet: 1
Gerrit-Project: asterixdb
Gerrit-Branch: master
Gerrit-Owner: Michael Blow <[email protected]>
Gerrit-Reviewer: Jenkins <[email protected]>
Gerrit-Reviewer: Michael Blow <[email protected]>
Gerrit-Reviewer: Yingyi Bu <[email protected]>
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