Elek, Marton created HDFS-12588:
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Summary: Use GenericOptionsParser for scm and ksm daemon
Key: HDFS-12588
URL: https://issues.apache.org/jira/browse/HDFS-12588
Project: Hadoop HDFS
Issue Type: Sub-task
Affects Versions: HDFS-7240
Reporter: Elek, Marton
Assignee: Elek, Marton
Most of the hadoop commands use the GenericOptionsParser to use some common CLI
arguments (such as -conf or -D or -libjars to define configuration/modify
configuration/modify classpath).
I suggest to use the same common options to scm and ksm daemons as well, as:
1. It allows to use the existing cluster management tools/scripts as the
daemons could be configured in the same way as namenode and datanode
2. It follows the convention from the hadoop common.
3. It's easier to develop from the IDE (I start the ksm/scm/datanode/namenode
from intellij but I need to add the configuration to the classpath. With -conf
I would able to use external configration.)
I found one problem during the implementation. Until now we used `hdfs scm`
command both for the daemon and the scm command line client. If there were no
parameters the daemon is started, with parameters the cli is started. The help
listed only the damon.
The -conf (GenericOptionParser) could be used only if we separate the scm and
scmcli commands. But any way, it's a more clean and visible if we have
separated `hdfs scm` and `hdfs scmcli`.
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