[jira] [Created] (CASSANDRA-10628) get JEMAlloc debug output out of nodetool output

["Jim Witschey (JIRA)" <ji...@apache.org>]

Jim Witschey created CASSANDRA-10628:
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             Summary: get JEMAlloc debug output out of nodetool output
                 Key: CASSANDRA-10628
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-10628
             Project: Cassandra
          Issue Type: Bug
            Reporter: Jim Witschey
            Assignee: Robert Stupp
             Fix For: 2.2.4, 3.0.0


This is a followup ticket for CASSANDRA-10581. The consensus on the Cassandra TE is that the debug output for loading JEMAlloc is helpful (or at least harmless when starting C*, but not when starting {{nodetool}}, which, it turns out, sources {{cassandra-env}}:

https://github.com/apache/cassandra/blob/trunk/bin/nodetool#L53

You can reproduce the excessive output with

{code}
ccm create test-nodetool-output -v git:cassandra-3.0 -n 1 ; ccm start --wait-for-binary-proto ; ccm node1 nodetool ring
{code}

The simplest solution would probably be to redirect the output of the sourcing to {{/dev/null/}}. I don't know if that's the right thing to do; it may be better to move the {{LD_PRELOAD}}-setting logic to {{bin/cassandra}}. I'm not sure what the reasoning would be for putting something in one place or another, so I leave it to the dev team to decide on the best solution.

Assigning [~snazy] for now; feel free to reassign



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