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https://issues.apache.org/jira/browse/BEAM-8029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17418728#comment-17418728
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Beam JIRA Bot commented on BEAM-8029:
-------------------------------------
This issue is assigned but has not received an update in 30 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Using BigQueryIO.read with DIRECT_READ causes Illegal Mutation
> ---------------------------------------------------------------
>
> Key: BEAM-8029
> URL: https://issues.apache.org/jira/browse/BEAM-8029
> Project: Beam
> Issue Type: Bug
> Components: io-java-gcp
> Affects Versions: 2.14.0
> Reporter: Chris Larsen
> Assignee: Svetak Vihaan Sundhar
> Priority: P3
> Labels: stale-assigned
>
>
> Code to read from BigQuery that is causing the issue:
> {code:java}
> pipeline
> .apply(BigQueryIO
> .read(SchemaAndRecord::getRecord)
> .from(options.getTableRef())
> .withMethod(Method.DIRECT_READ)
> .withCoder(AvroCoder.of(schema)))
> {code}
> If we remove .withMethod(Method.DIRECT_READ) then there is no issue.
>
> The error is:
> {code:java}
> org.apache.beam.sdk.util.IllegalMutationException: PTransform
> BigQueryIO.TypedRead/Read(BigQueryStorageTableSource) mutated value
> {"device_id": "rpi-rpi0-thermostat", "temperature_c": 20.0, "temperature_f":
> 52.0, "sample_time": 1564412307969368, "humidity": 74.3} after it was output
> (new value was {"device_id": "rpi-rpi0-thermostat", "temperature_c": 20.0,
> "temperature_f": 52.0, "sample_time": 1564412360458615, "humidity": 74.7}).
> Values must not be mutated in any way after being output.
> at
> org.apache.beam.runners.direct.ImmutabilityCheckingBundleFactory$ImmutabilityEnforcingBundle.commit
> (ImmutabilityCheckingBundleFactory.java:134)
> at org.apache.beam.runners.direct.EvaluationContext.commitBundles
> (EvaluationContext.java:210)
> at org.apache.beam.runners.direct.EvaluationContext.handleResult
> (EvaluationContext.java:151)
> at
> org.apache.beam.runners.direct.QuiescenceDriver$TimerIterableCompletionCallback.handleResult
> (QuiescenceDriver.java:262)
> at org.apache.beam.runners.direct.DirectTransformExecutor.finishBundle
> (DirectTransformExecutor.java:189)
> at org.apache.beam.runners.direct.DirectTransformExecutor.run
> (DirectTransformExecutor.java:126)
> at java.util.concurrent.Executors$RunnableAdapter.call
> (Executors.java:511)
> at java.util.concurrent.FutureTask.run (FutureTask.java:266)
> at java.util.concurrent.ThreadPoolExecutor.runWorker
> (ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run
> (ThreadPoolExecutor.java:624)
> at java.lang.Thread.run (Thread.java:748)
> Caused by: org.apache.beam.sdk.util.IllegalMutationException: Value
> {"device_id": "rpi-rpi0-thermostat", "temperature_c": 20.0, "temperature_f":
> 52.0, "sample_time": 1564412307969368, "humidity": 74.3} mutated illegally,
> new value was {"device_id": "rpi-rpi0-thermostat", "temperature_c": 20.0,
> "temperature_f": 52.0, "sample_time": 1564412360458615, "humidity": 74.7}.
> Encoding was
> AiZycGktcnBpMC10aGVybW9zdGF0AgAAAAAAADRAAgAAAAAAAEpAArDVsP7jtMcFAjMzMzMzk1JA,
> now
> AiZycGktcnBpMC10aGVybW9zdGF0AgAAAAAAADRAAgAAAAAAAEpAAu6FuLDktMcFAs3MzMzMrFJA.
> at
> org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector.illegalMutation
> (MutationDetectors.java:153)
> at
> org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodifiedThrowingCheckedExceptions
> (MutationDetectors.java:148)
> at
> org.apache.beam.sdk.util.MutationDetectors$CodedValueMutationDetector.verifyUnmodified
> (MutationDetectors.java:123)
> at
> org.apache.beam.runners.direct.ImmutabilityCheckingBundleFactory$ImmutabilityEnforcingBundle.commit
> (ImmutabilityCheckingBundleFactory.java:124)
> at org.apache.beam.runners.direct.EvaluationContext.commitBundles
> (EvaluationContext.java:210)
> at org.apache.beam.runners.direct.EvaluationContext.handleResult
> (EvaluationContext.java:151)
> at
> org.apache.beam.runners.direct.QuiescenceDriver$TimerIterableCompletionCallback.handleResult
> (QuiescenceDriver.java:262)
> at org.apache.beam.runners.direct.DirectTransformExecutor.finishBundle
> (DirectTransformExecutor.java:189)
> at org.apache.beam.runners.direct.DirectTransformExecutor.run
> (DirectTransformExecutor.java:126)
> at java.util.concurrent.Executors$RunnableAdapter.call
> (Executors.java:511)
> at java.util.concurrent.FutureTask.run (FutureTask.java:266)
> at java.util.concurrent.ThreadPoolExecutor.runWorker
> (ThreadPoolExecutor.java:1149)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run
> (ThreadPoolExecutor.java:624)
> at java.lang.Thread.run (Thread.java:748){code}
>
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