Examples with JobRestartRequestedException com.hazelcast.jet.impl.exception.JobRestartRequestedException used on opensource projects

Example 1 with JobRestartRequestedException

use of com.hazelcast.jet.impl.exception.JobRestartRequestedException in project hazelcast-jet by hazelcast.

the class MasterContext method getExecuteResult.

/**
 * <ul>
 * <li>Returns null if there is no failure.
 * <li>Returns CancellationException if the job is cancelled.
 * <li>Returns JobRestartRequestedException if the current execution is cancelled
 * <li>If there is at least one non-restartable failure, such as an exception in user code, then returns that failure.
 * <li>Otherwise, the failure is because a job participant has left the cluster.
 *   In that case, {@code TopologyChangeException} is returned so that the job will be restarted.
 * </ul>
 */
private Throwable getExecuteResult(Map<MemberInfo, Object> responses, boolean isRestartRequested) {
    if (cancellationToken.isCompleted()) {
        logger.fine(jobIdString() + " to be cancelled after execute");
        return new CancellationException();
    } else if (isRestartRequested) {
        return new JobRestartRequestedException();
    }
    Map<Boolean, List<Entry<MemberInfo, Object>>> grouped = groupResponses(responses);
    Collection<MemberInfo> successfulMembers = grouped.get(false).stream().map(Entry::getKey).collect(toList());
    if (successfulMembers.size() == executionPlanMap.size()) {
        logger.fine("Execute of " + jobIdString() + " is successful.");
        return null;
    }
    List<Entry<MemberInfo, Object>> failures = grouped.get(true);
    logger.fine("Execute of " + jobIdString() + " has failures: " + failures);
    // In that case, all remaining participants return a CancellationException.
    return failures.stream().map(e -> (Throwable) e.getValue()).filter(t -> !(t instanceof CancellationException || isTopologicalFailure(t))).findFirst().map(ExceptionUtil::peel).orElse(new TopologyChangedException());
}