wcarlson5 commented on a change in pull request #9984:
URL: https://github.com/apache/kafka/pull/9984#discussion_r566921429
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File path: streams/src/main/java/org/apache/kafka/streams/KafkaStreams.java
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@@ -983,19 +989,75 @@ private StreamThread createAndAddStreamThread(final long
cacheSizePerThread, fin
* no stream threads are alive
*/
public Optional<String> removeStreamThread() {
+ return removeStreamThread(Long.MAX_VALUE);
+ }
+
+ /**
+ * Removes one stream thread out of the running stream threads from this
Kafka Streams client.
+ * <p>
+ * The removed stream thread is gracefully shut down. This method does not
specify which stream
+ * thread is shut down.
+ * <p>
+ * Since the number of stream threads decreases, the sizes of the caches
in the remaining stream
+ * threads are adapted so that the sum of the cache sizes over all stream
threads equals the total
+ * cache size specified in configuration {@link
StreamsConfig#CACHE_MAX_BYTES_BUFFERING_CONFIG}.
+ *
+ * @param timeout The the length of time to wait for the thread to shutdown
+ * @throws org.apache.kafka.common.errors.TimeoutException if the thread
does not stop in time
+ * @return name of the removed stream thread or empty if a stream thread
could not be removed because
+ * no stream threads are alive
+ */
+ public Optional<String> removeStreamThread(final Duration timeout) {
+ final String msgPrefix = prepareMillisCheckFailMsgPrefix(timeout,
"timeout");
Review comment:
We are not allowing them as they will timeout but we are not stoping
someone from entering them
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