rehmanmuradali commented on a change in pull request #11154:
URL: https://github.com/apache/beam/pull/11154#discussion_r411345158
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File path:
runners/flink/src/main/java/org/apache/beam/runners/flink/translation/wrappers/streaming/DoFnOperator.java
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@@ -837,11 +837,15 @@ public void onProcessingTime(InternalTimer<ByteBuffer,
TimerData> timer) {
// allow overriding this in ExecutableStageDoFnOperator to set the key
context
protected void fireTimerInternal(Object key, TimerData timerData) {
- fireTimer(timerData);
+ if (key instanceof java.nio.ByteBuffer) {
+ key = FlinkKeyUtils.decodeKey((ByteBuffer) key, keyCoder);
Review comment:
```keyStateInternal.getKey()``` internally assumes that the key is of
type ```ByteBuffer``` and tries to decode it. Since we have some test that uses
decoded key, we get ClassCastException here as well. To prevent it I have added
a ```key instanceof java.nio.ByteBuffer``` check on ```timer.getKey```. This
will let me know when to decode, as a workaround. @mxm
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