Github user zjffdu commented on the issue:
https://github.com/apache/zeppelin/pull/1596
@agoodm @Leemoonsoo I found the issue, this is due that to
`PySparkInterpreter` depends on `SparkInterpreter`. So before opening
`PySparkInterpreter` we should creating `SparkInterpreter`. But seems there's
no mechanism to specify the dependency relationship between interpreters, so In
RemoteInterpreter, we did a hack IMO, we would create all the interpreters of
one session together even we may only use one interpreter. I update
RemoteInterpreter to make it work although it is still a hack. In the long
term, I think we can specify the dependency relationship between interpreters,
so that we can control which interpreter to create/open first, and we don't
need to create unnecessary interpreters, because for now IIUC, we would create
all the interpreter in one session even we use just one of them.
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