maytasm commented on a change in pull request #9610: Fix NPE in
RemoteTaskRunner event handler causes JVM shutdown
URL: https://github.com/apache/druid/pull/9610#discussion_r404593305
##########
File path:
indexing-service/src/main/java/org/apache/druid/indexing/overlord/RemoteTaskRunner.java
##########
@@ -1081,6 +979,117 @@ private boolean cancelWorkerCleanup(String workerHost)
}
}
+ @VisibleForTesting
+ PathChildrenCacheListener getStatusListener(final Worker worker, final
ZkWorker zkWorker, final SettableFuture<ZkWorker> retVal)
+ {
+ return (client, event) -> {
+ final String taskId;
+ final RemoteTaskRunnerWorkItem taskRunnerWorkItem;
+ synchronized (statusLock) {
+ try {
+ switch (event.getType()) { // lgtm
[java/dereferenced-value-may-be-null]
+ case CHILD_ADDED:
+ case CHILD_UPDATED:
+ taskId = ZKPaths.getNodeFromPath(event.getData().getPath()); //
lgtm [java/dereferenced-value-may-be-null]
Review comment:
- Confirmed that event cannot be null. Removed null check for the event.
- Added a separate catch block for NPE with a different alert message than
the existing message for catching any Exception. This should be more helpful to
operators. Let me know if you have suggestion on different wording or other KV
data to add to alert.
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