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https://issues.apache.org/jira/browse/CASSANDRA-12074?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15345329#comment-15345329
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Jeff Jirsa commented on CASSANDRA-12074:
----------------------------------------
Seems to work on OSX:
{code}
bash-3.2# ccm status
Cluster: 'test'
---------------
node1: UP
bash-3.2# netstat -lna | grep 7100
tcp4 0 0 127.0.0.1.7100 127.0.0.1.57741 ESTABLISHED
tcp4 0 0 127.0.0.1.57741 127.0.0.1.7100 ESTABLISHED
tcp4 0 0 127.0.0.1.7100 *.* LISTEN
bash-3.2# lsof -i ":7100" ; if [ $? -eq "0" ]; then echo "in use?"; else echo
"not in use"; fi
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 5895 root 92u IPv4 0xd9ed09d8f5e70fc1 0t0 TCP
localhost:font-service (LISTEN)
in use?
bash-3.2#
{code}
> Faster check for open JMX port on startup
> -----------------------------------------
>
> Key: CASSANDRA-12074
> URL: https://issues.apache.org/jira/browse/CASSANDRA-12074
> Project: Cassandra
> Issue Type: Improvement
> Components: Lifecycle
> Reporter: Tyler Hobbs
> Assignee: Tyler Hobbs
> Priority: Minor
> Fix For: 3.x
>
>
> Since CASSANDRA-7254, we check whether the JMX port is available before
> starting Cassandra in order to provide a better error message when another
> Cassandra process is already running. The current check starts a Java
> process to do this, which takes ~3 seconds. Instead, we can use {{lsof}},
> which is basically instantaneous.
> By my estimate, this will shave about 40 minutes off our dtest runs.
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