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https://issues.apache.org/jira/browse/BEAM-10153?focusedWorklogId=447891&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-447891
]
ASF GitHub Bot logged work on BEAM-10153:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 18/Jun/20 16:07
Start Date: 18/Jun/20 16:07
Worklog Time Spent: 10m
Work Description: y1chi commented on a change in pull request #12029:
URL: https://github.com/apache/beam/pull/12029#discussion_r442339948
##########
File path:
sdks/java/harness/src/main/java/org/apache/beam/fn/harness/state/FnApiStateAccessor.java
##########
@@ -128,7 +128,7 @@ public FnApiStateAccessor(
@Override
public ResultT get() {
ArgT currentArg = arg.get();
- if (currentArg != memoizedArg) {
+ if (currentArg != memoizedArg || currentArg == null) {
Review comment:
For VoidCoder the arg.get() returns null, which means the currentArg !=
memoizedArg will evaluate to false.
This leaves the memoizedResult to null(underneath function never applied),
and for VoidCoder key coder we need to set the key to ByteString.EMPTY instead
of null(generated proto class doesn't allow setting to null) I believe.
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Issue Time Tracking
-------------------
Worklog Id: (was: 447891)
Time Spent: 50m (was: 40m)
> Java SDK Harness throws NPE for VoidCoder as key coder
> ------------------------------------------------------
>
> Key: BEAM-10153
> URL: https://issues.apache.org/jira/browse/BEAM-10153
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-harness
> Reporter: Yichi Zhang
> Priority: P2
> Time Spent: 50m
> Remaining Estimate: 0h
>
> When using VoidCoder as the key coder, NullPointerException will be thrown
> for processing element.
> {code:java}
> java.lang.NullPointerException
> at
> org.apache.beam.model.fnexecution.v1.BeamFnApi$StateKey$BagUserState$Builder.setKey(BeamFnApi.java:39390)
> at
> org.apache.beam.fn.harness.state.FnApiStateAccessor.createBagUserStateKey(FnApiStateAccessor.java:444)
> at
> org.apache.beam.fn.harness.state.FnApiStateAccessor.bindValue(FnApiStateAccessor.java:195)
> at
> org.apache.beam.sdk.state.StateSpecs$ValueStateSpec.bind(StateSpecs.java:327)
> at
> org.apache.beam.sdk.state.StateSpecs$ValueStateSpec.bind(StateSpecs.java:317)
> at
> org.apache.beam.fn.harness.FnApiDoFnRunner$ProcessBundleContext.state(FnApiDoFnRunner.java:1432)
> at
> org.apache.beam.sdk.transforms.ParDoTest$TimerTests$TwoTimerTest$1$DoFnInvoker.invokeProcessElement(Unknown
> Source)
> at
> org.apache.beam.fn.harness.FnApiDoFnRunner.processElementForParDo(FnApiDoFnRunner.java:740)
> at
> org.apache.beam.fn.harness.FnApiDoFnRunner.access$700(FnApiDoFnRunner.java:132)
> at
> org.apache.beam.fn.harness.FnApiDoFnRunner$Factory.lambda$createRunnerForPTransform$1(FnApiDoFnRunner.java:203)
> at
> org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:216)
> at
> org.apache.beam.fn.harness.data.PCollectionConsumerRegistry$MetricTrackingFnDataReceiver.accept(PCollectionConsumerRegistry.java:179)
> at
> org.apache.beam.fn.harness.BeamFnDataReadRunner.forwardElementToConsumer(BeamFnDataReadRunner.java:204)
> at
> org.apache.beam.fn.harness.data.QueueingBeamFnDataClient.drainAndBlock(QueueingBeamFnDataClient.java:106)
> at
> org.apache.beam.fn.harness.control.ProcessBundleHandler.processBundle(ProcessBundleHandler.java:295)
> at
> org.apache.beam.fn.harness.control.BeamFnControlClient.delegateOnInstructionRequestType(BeamFnControlClient.java:173)
> at
> org.apache.beam.fn.harness.control.BeamFnControlClient.lambda$processInstructionRequests$0(BeamFnControlClient.java:157)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> {code}
> This fails validate runner tests such as
> https://github.com/apache/beam/blob/03d99dfa359f44a29a772fcc8ec8b0a237cab113/sdks/java/core/src/test/java/org/apache/beam/sdk/transforms/ParDoTest.java#L4120
> on dataflow runner with beam_fn_api.
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