lukecwik commented on a change in pull request #16727:
URL: https://github.com/apache/beam/pull/16727#discussion_r817915598
##########
File path:
sdks/java/core/src/test/java/org/apache/beam/sdk/transforms/ParDoLifecycleTest.java
##########
@@ -387,43 +367,84 @@ private ExceptionThrowingFn(MethodForException toThrow) {
this.toThrow = toThrow;
}
+ private static void validate(CallState... requiredCallStates) {
+ Map<Integer, DelayedCallStateTracker> callStates;
+ synchronized (ExceptionThrowingFn.class) {
Review comment:
Started seeing failures like:
```
java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextNode(HashMap.java:1469)
at java.util.HashMap$ValueIterator.next(HashMap.java:1498)
at java.util.AbstractCollection.toString(AbstractCollection.java:461)
at java.lang.String.valueOf(String.java:2994)
at java.lang.StringBuilder.append(StringBuilder.java:131)
at
org.apache.beam.sdk.transforms.ParDoLifecycleTest$ExceptionThrowingFn.validate(ParDoLifecycleTest.java:392)
at
org.apache.beam.sdk.transforms.ParDoLifecycleTest$ExceptionThrowingFn.access$300(ParDoLifecycleTest.java:356)
at
org.apache.beam.sdk.transforms.ParDoLifecycleTest.testTeardownCalledAfterExceptionInProcessElementStateful(ParDoLifecycleTest.java:269)
```
Filed https://issues.apache.org/jira/projects/BEAM/issues/BEAM-14027
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