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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4657) Implement HighAvailabilityServices based on zookeeper
Date Tue, 27 Sep 2016 17:03:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15526750#comment-15526750
] 

ASF GitHub Bot commented on FLINK-4657:
---------------------------------------

Github user StephanEwen commented on a diff in the pull request:

    https://github.com/apache/flink/pull/2550#discussion_r80734121
  
    --- Diff: flink-runtime/src/main/java/org/apache/flink/runtime/jobmaster/JobMaster.java
---
    @@ -467,6 +487,128 @@ public void registerAtResourceManager(final String address) {
     		//TODO:: register at the RM
     	}
     
    +	@RpcMethod
    +	public NextInputSplit requestNextInputSplit(final JobVertexID vertexID, final ExecutionAttemptID
executionAttempt) {
    +		final byte[] serializedInputSplit;
    +
    +		final Execution execution = executionGraph.getRegisteredExecutions().get(executionAttempt);
    +		if (execution == null) {
    +			log.error("Can not find Execution for attempt {}.", executionAttempt);
    +			return null;
    --- End diff --
    
    Let's let this throw an exception - after all, the caller receiver should react to the
fact that the JobManager is not aware of its execution any more.


> Implement HighAvailabilityServices based on zookeeper
> -----------------------------------------------------
>
>                 Key: FLINK-4657
>                 URL: https://issues.apache.org/jira/browse/FLINK-4657
>             Project: Flink
>          Issue Type: New Feature
>          Components: Cluster Management
>            Reporter: Kurt Young
>            Assignee: Kurt Young
>
> For flip-6, we will have ResourceManager and every JobManager as potential leader contender
and retriever. We should separate them by using different zookeeper path. 
> For example, the path could be /leader/resource-manaeger for RM. And for each JM, the
path could be /leader/job-managers/JobID



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