Sidharta Seethana created HADOOP-12748:
------------------------------------------
Summary: Uncaught exceptions are not caught/logged when
ExecutorService is used
Key: HADOOP-12748
URL: https://issues.apache.org/jira/browse/HADOOP-12748
Project: Hadoop Common
Issue Type: Bug
Reporter: Sidharta Seethana
Assignee: Sidharta Seethana
{{ThreadPoolExecutor}} catches (otherwise uncaught) exceptions/errors thrown by
the tasks running in the corresponding thread pool. These are passed to an
{{afterExecute}} method which seems to do nothing by default unless overridden.
Even though we register {{UncaughtExceptionHandler}}s in various places (e.g
{{YarnUncaughtExceptionHandler}}), these handlers are not invoked because the
uncaught exceptions/errors are not propagated all the way.
To fix this, one mechanism would be to override {{ThreadPoolExecutor}} with an
{{afterExecute}} method that would log these exceptions/errors. Logging these
exceptions/errors would be useful in debug issues that are otherwise difficult
to trace (e.g YARN-4643) because there is nothing in the logs indicating an
uncaught exception/error
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
