xinglin commented on code in PR #5803:
URL: https://github.com/apache/hadoop/pull/5803#discussion_r1258972944
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hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/server/namenode/ha/ObserverReadProxyProvider.java:
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@@ -648,6 +645,7 @@ public synchronized void close() throws IOException {
}
}
failoverProxy.close();
+ nnProbingThreadPool.shutdown();
Review Comment:
According to this post, it would be called when the garbage collector is
reclaiming that object. When that would happen is out of control from
programmers.
https://stackoverflow.com/questions/18670658/why-close-cannot-be-called-on-closeable-classes-automatically
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