cloudera cdh - Oozie Shared Lib: where to place jars -

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i have installed cloudera cdh quickstart vm 5.5, , i'm running sqoop action in oozie workflow. encountered error says mysql jdbc driver missing , came across answer here says mysql-connector-java.jar should placed in oozie's hdfs shared lib path, under sqoop path.

when browse oozie's hdfs shared lib path, however, i've noticed 2 sqoop subdirectories copy jar.

/user/oozie/share/lib/sqoop

and

/user/oozie/share/lib/lib_20151118030154/sqoop

aside sqoop, hive, pig, distcp, , mapreduce-streaming paths exist on both lib , lib/lib_20151118030154.

so question is: place connector jar: on first or second one?

what's difference (or difference of purpose) of these 2 paths in relation jars of sqoop, hive, pig, distcp, , mapreduce-streaming oozie?

the lib_20151118030154 sub-dir current version of sharelibs, of 18-nov-2015. versioning allows make updates without stopping oozie service -- check documentation here.

in other words: oozie service keeps in memory list of jars in each sharelib (based on present latest version @ boot time), adding jar not make difference until (a) stop/restart service or (b) resync service explained in doc above.


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