What is this callback host in RemoteInterpreterServer? Does it specify a concrete instance of Zeppelin? If yes, why? I would think that the interpreter waits on a port and creates its new instances for any Zeppelin instance that connects.
On Tue, Nov 5, 2019 at 8:58 AM Artur Rataj <arturra...@gmail.com> wrote: > > So I will write a local interpreter for now. I want to use Zeppelin as an UI > of an app, but I do not want to put an app into Zeppelin sources, a remote > interpreter would be very handy here. > > > > > On Tue, Nov 5, 2019 at 2:30 AM Jeff Zhang <zjf...@gmail.com> wrote: >> >> 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
