dima5rr opened a new pull request #8706:
URL: https://github.com/apache/kafka/pull/8706
StreamThreadStateStoreProvider#stores throws exception whenever taskId is
not found, which is not correct behaviour in multi-threaded env where state
store partitions are distributed among several StreamTasks.
final Task task = tasks.get(keyTaskId);
if (task == null) {
throw new InvalidStateStoreException(
String.format("The specified partition %d for store %s does not exist.",
storeQueryParams.partition(),
storeName));
}
Reproducible with KStream number of threads more then 1
StoreQueryIntegrationTest#streamsConfiguration
config.put(StreamsConfig.NUM_STREAM_THREADS_CONFIG, 2);
Suggested solution is to not throw exception if at least one state store is
found, which is always true when using StoreQueryParameters.withPartition
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