xkrogen commented on code in PR #5160:
URL: https://github.com/apache/hadoop/pull/5160#discussion_r1038622347
##########
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/KeyProviderCache.java:
##########
@@ -68,8 +68,11 @@ public void onRemoval(
})
.build();
- ShutdownHookManager.get().addShutdownHook(new KeyProviderCacheFinalizer(),
- SHUTDOWN_HOOK_PRIORITY);
+ try {
+ ShutdownHookManager.get().addShutdownHook(new
KeyProviderCacheFinalizer(), SHUTDOWN_HOOK_PRIORITY);
+ } catch (IllegalStateException e) {
+ LOG.warn("shutdownHook not added", e);
+ }
Review Comment:
We should first check if a shutdown is in progress and then add a shutdown
hook if not, rather than catching the exception. Like the example in
`FileSystem`:
https://github.com/apache/hadoop/blob/60e0fe87094771b3188b9b1cd4bf7acf54d40ab7/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FileSystem.java#L3715-L3720
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