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https://issues.apache.org/jira/browse/FLINK-4490?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15457930#comment-15457930
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ASF GitHub Bot commented on FLINK-4490:
---------------------------------------
Github user tillrohrmann commented on a diff in the pull request:
https://github.com/apache/flink/pull/2447#discussion_r77310730
--- Diff:
flink-runtime/src/main/java/org/apache/flink/runtime/deployment/InputChannelDeploymentDescriptor.java
---
@@ -104,16 +107,17 @@ public String toString() {
(producerState == ExecutionState.RUNNING
|| producerState ==
ExecutionState.FINISHED)) {
- final Instance partitionInstance =
producerSlot.getInstance();
+ final TaskManagerLocation
partitionTaskManagerLocation = producerSlot.getTaskManagerLocation();
+ final ResourceID partitionTaskManager =
partitionTaskManagerLocation.getResourceID();
--- End diff --
But in the future the partition might reside on a machine which was not the
producer. Thus, I guess that it's good then.
> Decouple Slot and Instance
> --------------------------
>
> Key: FLINK-4490
> URL: https://issues.apache.org/jira/browse/FLINK-4490
> Project: Flink
> Issue Type: Sub-task
> Components: Distributed Coordination
> Reporter: Kurt Young
> Fix For: 1.2.0
>
>
> Currently, {{Slot}} and {{Instance}} holds each other. For {{Instance}}
> holding {{Slot}}, it makes sense because it reflects how many resources it
> can provide and how many are using.
> But it's not very necessary for {{Slot}} to hold {{Instance}} which it
> belongs to. It only needs to hold some connection information and gateway to
> talk to. Another downside for {{Slot}} holding {{Instance}} is that
> {{Instance}} actually contains some allocate/de-allocation logicals, it will
> be difficult if we want to do some allocation refactor without letting
> {{Slot}} noticed.
> We should abstract the connection information of {{Instance}} to let {{Slot}}
> holds. (Actually we have {{InstanceConnectionInfo}} now, but lacks of
> instance's akka gateway, maybe we can just adding the akka gateway to the
> {{InstanceConnectionInfo}})
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