jojochuang commented on a change in pull request #3819:
URL: https://github.com/apache/hadoop/pull/3819#discussion_r773600232
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File path:
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/namenode/NNThroughputBenchmark.java
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@@ -265,6 +265,11 @@ void benchmark() throws IOException {
LOG.info("Starting " + numOpsRequired + " " + getOpName() + "(s).");
for(StatsDaemon d : daemons)
d.start();
+ } catch (Exception e) {
+ if (e instanceof ArrayIndexOutOfBoundsException) {
+ LOG.error("The -dirsPerDir or -filesPerDir parameter set is
incorrect.");
Review comment:
It would be really nice to suggest a valid range of number of
directories or files. For example, up to 1 million directories?
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