I think connecting to remote interpreter is broken in 0.9, because we introduce bi-directional communication channel in 0.9.
https://issues.apache.org/jira/browse/ZEPPELIN-2035 Artur Rataj <arturra...@gmail.com> 于2019年11月5日周二 上午12:42写道： > Please, give me some hints... > > On Mon, Nov 4, 2019 at 5:39 PM Artur Rataj <arturra...@gmail.com> wrote: > > > > 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 > -- Best Regards Jeff Zhang
