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https://issues.apache.org/jira/browse/BEAM-14064?focusedWorklogId=745429&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-745429
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ASF GitHub Bot logged work on BEAM-14064:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 21/Mar/22 21:04
Start Date: 21/Mar/22 21:04
Worklog Time Spent: 10m
Work Description: codecov[bot] edited a comment on pull request #17112:
URL: https://github.com/apache/beam/pull/17112#issuecomment-1073837956
#
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@@ Coverage Diff @@
## master #17112 +/- ##
==========================================
+ Coverage 73.95% 73.97% +0.01%
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Files 669 671 +2
Lines 88159 88227 +68
==========================================
+ Hits 65201 65267 +66
- Misses 21846 21848 +2
Partials 1112 1112
```
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Issue Time Tracking
-------------------
Worklog Id: (was: 745429)
Time Spent: 4h 50m (was: 4h 40m)
> ElasticSearchIO#Write buffering and outputting across windows
> -------------------------------------------------------------
>
> Key: BEAM-14064
> URL: https://issues.apache.org/jira/browse/BEAM-14064
> Project: Beam
> Issue Type: Bug
> Components: io-java-elasticsearch
> Affects Versions: 2.35.0, 2.36.0, 2.37.0
> Reporter: Luke Cwik
> Assignee: Evan Galpin
> Priority: P1
> Fix For: 2.38.0
>
> Time Spent: 4h 50m
> Remaining Estimate: 0h
>
> Source: https://lists.apache.org/thread/mtwtno2o88lx3zl12jlz7o5w1lcgm2db
> Bug PR: https://github.com/apache/beam/pull/15381
> ElasticsearchIO is collecting results from elements in window X and then
> trying to output them in window Y when flushing the batch. This exposed a bug
> where elements that were being buffered were being output as part of a
> different window than what the window that produced them was.
> This became visible because validation was added recently to ensure that when
> the pipeline is processing elements in window X that output with a timestamp
> is valid for window X. Note that this validation only occurs in
> *@ProcessElement* since output is associated with the current window with the
> input element that is being processed.
> It is ok to do this in *@FinishBundle* since there is no existing windowing
> context and when you output that element is assigned to an appropriate window.
> *Further Context*
> We’ve bisected it to being introduced in 2.35.0, and I’m reasonably certain
> it’s this PR https://github.com/apache/beam/pull/15381
> Our scenario is pretty trivial, we read off Pubsub and write to Elastic in a
> streaming job, the config for the source and sink is respectively
> {noformat}
> pipeline.apply(
> PubsubIO.readStrings().fromSubscription(subscription)
> ).apply(ParseJsons.of(OurObject::class.java))
> .setCoder(KryoCoder.of())
> {noformat}
> and
> {noformat}
> ElasticsearchIO.write()
> .withUseStatefulBatches(true)
> .withMaxParallelRequestsPerWindow(1)
> .withMaxBufferingDuration(Duration.standardSeconds(30))
> // 5 bytes **> KiB **> MiB, so 5 MiB
> .withMaxBatchSizeBytes(5L * 1024 * 1024)
> // # of docs
> .withMaxBatchSize(1000)
> .withConnectionConfiguration(
> ElasticsearchIO.ConnectionConfiguration.create(
> arrayOf(host),
> "fubar",
> "_doc"
> ).withConnectTimeout(5000)
> .withSocketTimeout(30000)
> )
> .withRetryConfiguration(
> ElasticsearchIO.RetryConfiguration.create(
> 10,
> // the duration is wall clock, against the connection and
> socket timeouts specified
> // above. I.e., 10 x 30s is gonna be more than 3 minutes,
> so if we're getting
> // 10 socket timeouts in a row, this would ignore the
> "10" part and terminate
> // after 6. The idea is that in a mixed failure mode,
> you'd get different timeouts
> // of different durations, and on average 10 x fails < 4m.
> // That said, 4m is arbitrary, so adjust as and when
> needed.
> Duration.standardMinutes(4)
> )
> )
> .withIdFn { f: JsonNode -> f["id"].asText() }
> .withIndexFn { f: JsonNode -> f["schema_name"].asText() }
> .withIsDeleteFn { f: JsonNode -> f["_action"].asText("noop") ==
> "delete" }
> {noformat}
> We recently tried upgrading 2.33 to 2.36 and immediately hit a bug in the
> consumer, due to alleged time skew, specifically
> {noformat}
> 2022-03-07 10:48:37.886 GMTError message from worker:
> java.lang.IllegalArgumentException: Cannot output with timestamp
> 2022-03-07T10:43:38.640Z. Output timestamps must be no earlier than the
> timestamp of the
> current input (2022-03-07T10:43:43.562Z) minus the allowed skew (0
> milliseconds) and no later than 294247-01-10T04:00:54.775Z. See the
> DoFn#getAllowedTimestampSkew() Javadoc
> for details on changing the allowed skew.
> org.apache.beam.runners.dataflow.worker.repackaged.org.apache.beam.runners.core.SimpleDoFnRunner$DoFnProcessContext.checkTimestamp(SimpleDoFnRunner.java:446)
>
> org.apache.beam.runners.dataflow.worker.repackaged.org.apache.beam.runners.core.SimpleDoFnRunner$DoFnProcessContext.outputWithTimestamp(SimpleDoFnRunner.java:422)
>
> org.apache.beam.sdk.io.elasticsearch.ElasticsearchIO$BulkIO$BulkIOBaseFn$ProcessContextAdapter.output(ElasticsearchIO.java:2364)
>
> org.apache.beam.sdk.io.elasticsearch.ElasticsearchIO$BulkIO$BulkIOBaseFn.flushAndOutputResults(ElasticsearchIO.java:2404)
> org.apache.beam.sdk.io.elasticsearch.ElasticsearchIO$BulkIO$BulkIOBaseFn.addAndMaybeFlush(ElasticsearchIO.java:2419)
> org.apache.beam.sdk.io.elasticsearch.ElasticsearchIO$BulkIO$BulkIOStatefulFn.processElement(ElasticsearchIO.java:2300)
> {noformat}
> I’ve bisected it and 2.34 works fine, 2.35 is the first version this breaks,
> and it seems like the code in the trace is largely added by the PR linked
> above. The error usually claims a skew of a few seconds, but obviously I
> can’t override getAllowedTimestampSkew() on the internal Elastic DoFn, and
> it’s marked deprecated anyway.
> I’m happy to raise a JIRA but I’m not 100% sure what the code was intending
> to fix, and additionally, I’d also be happy if someone else can reproduce
> this or knows of similar reports. I feel like what we’re doing is not that
> uncommon a scenario, so I would have thought someone else would have hit this
> by now.
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