functioner commented on a change in pull request #2737:
URL: https://github.com/apache/hadoop/pull/2737#discussion_r601739047
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File path:
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FSEditLogAsync.java
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@@ -63,6 +68,9 @@
DFS_NAMENODE_EDITS_ASYNC_LOGGING_PENDING_QUEUE_SIZE_DEFAULT);
editPendingQ = new ArrayBlockingQueue<>(editPendingQSize);
+
+ // the thread pool size should be configurable later, and justified with a
rationale
+ logSyncNotifyExecutor = Executors.newFixedThreadPool(10);
Review comment:
Sure. What should be the default value? Many users use the default
value, so probably we shouldn't set it as 0 by default.
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