mynameborat commented on code in PR #1652:
URL: https://github.com/apache/samza/pull/1652#discussion_r1092298435
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samza-log4j2/src/main/java/org/apache/samza/logging/log4j2/StreamAppender.java:
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@@ -186,13 +190,20 @@ public void append(LogEvent event) {
if (!systemInitialized) {
// configs are needed to set up producer system, so check that before
actually initializing
if (this.loggingContextHolder.getConfig() != null) {
- synchronized (this) {
- if (!systemInitialized) {
- setupSystem();
- systemInitialized = true;
+ if (setUpSystemLock.tryLock(SET_UP_SYSTEM_TIMEOUT_MILLI_SECONDS,
TimeUnit.MILLISECONDS)) {
+ try {
+ if (!systemInitialized) {
+ setupSystem();
Review Comment:
There are no guarantees from `setupSystem` on providing idempotence nor able
to setup system on the subsequent retries in case of failures.
So if we are handling externally for the former, why not handle the latter
as well.
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