Matthias Veit created MESOS-2718:
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Summary: Future created by State.names() throws an Illegal
ExecutionException
Key: MESOS-2718
URL: https://issues.apache.org/jira/browse/MESOS-2718
Project: Mesos
Issue Type: Bug
Components: java api
Affects Versions: 0.22.1
Environment: OSX, Mesos 0.22.1
Reporter: Matthias Veit
During application startup, we call call org.apache.mesos.state.State.names().
This will return a java Future.
Everything is fine in the success case.
In the error case, the future can throw either an InterruptedException,
ExecutionException or a RuntimeException.
The ExecutionException indicates, that the future was not successful.
This is the text from the javadoc:
Exception thrown when attempting to retrieve the result of a task that aborted
by throwing an exception. This exception can be inspected using the
Throwable.getCause() method. See here:
https://docs.oracle.com/javase/7/docs/api/java/util/concurrent/ExecutionException.html
The ExecutionException thrown by mesos in the above method does not hold a
reference to the root cause, but returns a reference to this as cause (ex ==
ex.getCause()).
ExecutionException really is a wrapper exception to indicate success or failure
of the java future and should always have a root cause.
With the current implementation we can't distinguish between a Future error or
an application error. Please provide always the exception cause.
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