To sum this up,
https://zeppelin.apache.org/docs/0.7.0/manual/interpreters.html#connecting-to-the-existing-remote-interpreter
says
RemoteInterpreterServer interpreter=new RemoteInterpreterServer(3678);
// Here, 3678 is the port on which interpreter will listen.
This constructor, however, does not exist any more. What exists is:
public RemoteInterpreterServer(String intpEventServerHost,
int intpEventServerPort,
String portRange,
String interpreterGroupId,
boolean isTest)
which requires intpEventServerHost!=null && isTest=false for
createInterpreter() to work. This in turn attempts to connect to
intpEventServerHost:intpEventServerPort. The latter looks like
"interpreter event server host". Possibly it is about the web server,
so I put localhost:8080 there.
So possibly, now it is the interpreter which connects to Zeppelin, and
not the opposite? But then why "connect to remote process" still
requires a port? I need to specify the port somewhere. Be it,
"portRange" has something in common? Not, putting a port there makes
IndexOutOfBoundException elsewhere. So port:port possibly if it is
called a range? This time, createInterpreter works, but even after
interpreter restart, Zeppelin shows "Interpreter process is not
running: null".
I appreciate your effort, I know that Zeppelin has in general good
docs, and that it is just an experimental snapshot, but I give up. It
is about a *remote* interpreter anyway, and I do not want to become a
Zeppelin insider because of it, would read some rudimentary docs
instead.
On Mon, Nov 4, 2019 at 4:52 PM Artur Rataj <arturra...@gmail.com> wrote:
>
> So I attempted to write a rudimentary remote interpreter anyway,
> despite that isTest needs to be true for the remote server constructor
> to work. The effect is, the server's method createInterpreter throws
> NullPointerException, as it calls intpEventClient, which in turn is
> initialised only if isTest is false.
>
>
>
>
> On Mon, Nov 4, 2019 at 4:06 PM Artur Rataj <arturra...@gmail.com> wrote:
> >
> > Yes, I can do that, but I would want to connect to my interpreter via
> > any Zeppelin instance, not only via one customised, with an additional
> > interpreter added to its sources at compile time. This is why I wanted
> > to use a remote interpreter, i.e. one in an independent application.
> >
> > This constructor:
> >
> > RemoteInterpreterServer interpreter=new
> > RemoteInterpreterServer("localhost",
> >
> > RemoteInterpreterUtils.findRandomAvailablePortOnAllLocalInterfaces(),
> > ":", "groupId", true);
> >
> > works only with isTest=true, which I guess is for ... testing only.
> > But I do not know, there are no docs.
> >
> > If the remote interpreter does not work, I will modify some simple
> > interpreter to support a remote interpreter. I guess that it would
> > work, but it seems somewhat nonsensical to implement a functionality
> > which in theory is already provided by Zeppelin.
> >
> >
> > On Mon, Nov 4, 2019 at 3:55 PM Jeff Zhang <zjf...@gmail.com> wrote:
> > >
> > > The most simplest interpreter might be shell interpreter. You can create
> > > a simple interpreter module like sh module, and extend abstract class
> > > Interpreter.
> > >
> > > Refer
> > > http://zeppelin.apache.org/docs/0.8.2/development/writing_zeppelin_interpreter.html#make-your-own-interpreter
> > >
> > > https://github.com/apache/zeppelin/blob/master/shell/src/main/java/org/apache/zeppelin/shell/ShellInterpreter.java
> > >
> > >
> > > Artur Rataj <arturra...@gmail.com> 于2019年11月4日周一 下午10:44写道：
> > >>
> > >> I would need any way of writing a remote interpreter for Zeppelin 0.9.
> > >> It would be useful to have some docs, an example or whatever which
> > >> describes RemoteInterpreterServer in 0.9. No API docs in the sources,
> > >> searching in turn for an actual usage of RemoteInterpreterServer on
> > >> the web shows some no-more-working test in 0.9.
> > >>
> > >> If I connect via Zeppelin to (new RemoteInterpreterServer(null,
> > >> SOME_PORT, "some-name", null)).start() and connect via add
> > >> interpterer/connect to existing process on the Zeppelin side, I get it
> > >> causes java.lang.RuntimeException:
> > >> org.apache.thrift.TApplicationException: Internal error processing
> > >> createInterpreter. If I replace null with any name like localhost, i
> > >> get "connection refused" on the interpreter side. By the way, checking
> > >> "connect to existing process" still makes it mandatory to specify
> > >> "interpreter group".
> > >>
> > >> Could you give me some basic hints on making a connection to a simple
> > >> remote interpreter which consumes paragraph contents and produces
> > >> %html?
> > >
> > >
> > >
> > > --
> > > Best Regards
> > >
> > > Jeff Zhang
