question Re: Nifi : groovy: 32: unable to resolve class JSch in Support Questions

Nifi : groovy: 32: unable to resolve class JSch

Galapow — Sat, 25 Jan 2020 17:36:42 GMT

Hello,

I'm running a groovy script which handles SFTP

My Apache NiFi version is 1.5.0.3.1.2.0-7

My script starts with this:

import com.jcraft.jsch.*

def flowFile = session.get()
if(!flowFile) {
return
}

....

When I receive the file to process and move I see them in the queue but also the following is appear in the in the nifi-app.log

2020-01-25 19:00:00,041 ERROR [Timer-Driven Process Thread-8] o.a.nifi.processors.script.ExecuteScript ExecuteScript[id=56c17bab-81ba-313c-9a00-aa82d48c3ea0] ExecuteScript[id=56c17bab-81ba-313c-9a00-aa82d48c3ea0] failed to process due to org.apache.nifi.processor.exception.ProcessException: javax.script.ScriptException: org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
Script10025.groovy: 32: unable to resolve class JSch
@ line 32, column 6.
JSch ssh = new JSch()
^

Script10025.groovy: 32: unable to resolve class JSch
@ line 32, column 12.
JSch ssh = new JSch()
^

Script10025.groovy: 33: unable to resolve class Session
@ line 33, column 9.
Session sshSession = ssh.getSession(sftpUser, sftpHost, sftpPort)
^

Script10025.groovy: 35: unable to resolve class Channel
@ line 35, column 10.
Channel channel

The script is using the following bundle

org.apache.nifi - nifi-scripting-nar

I can find the above bundle here

/hadoop/nifi/work/nar/extensions/nifi-standard-nar-1.5.0.3.1.2.0-7.nar-unpacked

Could you please suggest what should I check to fix the problem ?

Thanks.

Re: Nifi : groovy: 32: unable to resolve class JSch

DennisJaheruddi — Sun, 26 Jan 2020 12:11:25 GMT

Here are the standard steps for debugging scripts that fail in Nifi.

1. Please make sure the script works in general.

2. Then make sure that in your test you are on the same machine with the same rights and such.

Usually this suffices, if it really fails we can dig more to search about this kind of problem.

Re: Nifi : groovy: 32: unable to resolve class JSch

Galapow — Sun, 26 Jan 2020 17:56:25 GMT

Hello @DennisJaheruddi

Thanks for your suggestions.

The scripts works in general.

Based on the error message I dont think this is problem with rights but I compared the good one with the problematic one.

From OS level perspective

I'm using nifi user to run the nifi process and the user is the owner /hadoop/nifi which is the working directory for nifi and has all the read/write/execute permission.

Did you mean other rights and such?

Thanks

Re: Nifi : groovy: 32: unable to resolve class JSch

Galapow — Mon, 27 Jan 2020 16:47:02 GMT

Problem is solved

The module directory field was incorrect.