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Posted to github@beam.apache.org by GitBox <gi...@apache.org> on 2021/07/26 22:42:45 UTC
[GitHub] [beam] slavachernyak opened a new pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
slavachernyak opened a new pull request #15224:
URL: https://github.com/apache/beam/pull/15224
GetDataStream calls may become stuck indefinitely. This avoids the stuckness by causing the read to be aborted and retried.
R: @ibzib
------------------------
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`ValidatesRunner` compliance status (on master branch)
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Examples testing status on various runners
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Post-Commit SDK/Transform Integration Tests Status (on master branch)
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[GitHub] [beam] cluther commented on pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
cluther commented on pull request #15224:
URL: https://github.com/apache/beam/pull/15224#issuecomment-969437996
I have also seen 60,000+ of these over a 48 hour period on one of my streaming jobs on Google Cloud Dataflow after upgrading it from 2.26.0 to 2.33.0. I can't say for sure that it's related, but it seems strongly correlated with the watermark falling behind.
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[GitHub] [beam] DonAtMabl commented on pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
DonAtMabl commented on pull request #15224:
URL: https://github.com/apache/beam/pull/15224#issuecomment-970607927
In my case it seems to have been caused by an internal GCP issue. We opened a ticket and it was resolved.
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[GitHub] [beam] ibzib merged pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
ibzib merged pull request #15224:
URL: https://github.com/apache/beam/pull/15224
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[GitHub] [beam] ibzib commented on a change in pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
ibzib commented on a change in pull request #15224:
URL: https://github.com/apache/beam/pull/15224#discussion_r676995467
##########
File path: runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/GrpcWindmillServer.java
##########
@@ -1525,8 +1525,8 @@ public boolean hasMoreElements() {
try {
blockedStartMs.set(Instant.now().getMillis());
- current = queue.take();
- if (current != POISON_PILL) {
+ current = queue.poll(180, TimeUnit.SECONDS);
+ if (current != null && current != POISON_PILL) {
Review comment:
If `current == null` we could fall through to the `Got poison pill but stream is not done.` exception. Shouldn't we introduce a separate case for the timeout?
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[GitHub] [beam] DonAtMabl commented on pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
DonAtMabl commented on pull request #15224:
URL: https://github.com/apache/beam/pull/15224#issuecomment-968169191
@slavachernyak thanks for this fix. If you have time to elaborate, what are the scenarios that can cause this to happen? I am seeing occasional spikes of this error and it seems to take a while to resolve, so I'm hoping to get a better understanding of what is going on.
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[GitHub] [beam] slavachernyak commented on a change in pull request #15224: [BEAM-12661] Fix stuck GetData Windmill calls
Posted by GitBox <gi...@apache.org>.
slavachernyak commented on a change in pull request #15224:
URL: https://github.com/apache/beam/pull/15224#discussion_r676998716
##########
File path: runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/windmill/GrpcWindmillServer.java
##########
@@ -1525,8 +1525,8 @@ public boolean hasMoreElements() {
try {
blockedStartMs.set(Instant.now().getMillis());
- current = queue.take();
- if (current != POISON_PILL) {
+ current = queue.poll(180, TimeUnit.SECONDS);
+ if (current != null && current != POISON_PILL) {
Review comment:
I don't think we need a separate exception - i just updated the error message to indicate either case was possible
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