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https://issues.apache.org/jira/browse/FLINK-15448?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17010296#comment-17010296
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Xintong Song commented on FLINK-15448:
--------------------------------------
[~trohrmann]
If we are touching the distributed component IDs, I would suggest to make it a
FLIP, or at least a ML discussion thread with a design doc. I can see several
issues need to be discussed, and there could be more.
* What information exactly do we want to include in the IDs?
* What information should be used to identify the machine where the component
is running, especially in containerized environment like Kubernetes.
* Could the new "ID mechanism" be used to solve the problem of pending slot
matching? Currently the resource profile based matching is fragile and already
caused us many problems.
* The ongoing FLIP-56 should also be take into consideration, where we are
attempting to remove the SlotID.
> Log host informations for TaskManager failures.
> -----------------------------------------------
>
> Key: FLINK-15448
> URL: https://issues.apache.org/jira/browse/FLINK-15448
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Coordination
> Affects Versions: 1.9.1
> Reporter: Victor Wong
> Assignee: Victor Wong
> Priority: Minor
>
> With Flink on Yarn, sometimes we ran into an exception like this:
> {code:java}
> java.util.concurrent.TimeoutException: The heartbeat of TaskManager with id
> container_xxxx timed out.
> {code}
> We'd like to find out the host of the lost TaskManager to log into it for
> more details, we have to check the previous logs for the host information,
> which is a little time-consuming.
> Maybe we can add more descriptive information to ResourceID of Yarn
> containers, e.g. "container_xxx@host_name:port_number".
> Here's the demo:
> {code:java}
> class ResourceID {
> final String resourceId;
> final String details;
> public ResourceID(String resourceId) {
> this.resourceId = resourceId;
> this.details = resourceId;
> }
> public ResourceID(String resourceId, String details) {
> this.resourceId = resourceId;
> this.details = details;
> }
> public String toString() {
> return details;
> }
> }
> // in flink-yarn
> private void startTaskExecutorInContainer(Container container) {
> final String containerIdStr = container.getId().toString();
> final String containerDetail = container.getId() + "@" +
> container.getNodeId();
> final ResourceID resourceId = new ResourceID(containerIdStr,
> containerDetail);
> ...
> }
> {code}
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