Error when running Jmeter + RTE protocol script

sts...@gmail.com

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Jun 19, 2019, 3:41:23 PM6/19/19

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We are currently working on creating scripts for IBM mainframe application using Jmeter and bzm-RTE Plugin. We are able to connect to mainframe terminal and then navigate to TPX home page. But the issue is that the next RTE sampler for Login is not working and throwing the below exception error. It is also not showing any response in the view results tree listener and not navigating to the next page after login.

Input for Login:

(20, 20): userid

(21, 20): password

Error captured in Log:

019-06-11 14:35:15,698 ERROR o.a.j.t.JMeterThread: Error while processing sampler: ‘Login To region – RTE Sampler’.
java.lang.NullPointerException: null
at com.bytezone.dm3270.TerminalClient.getScreenText(TerminalClient.java:199) ~[dm3270-lib-0.7.jar:?]
at com.blazemeter.jmeter.rte.protocols.tn3270.Tn3270Client.getScreen(Tn3270Client.java:209) ~[jmeter-bzm-rte-1.1.1.jar:?]
at com.blazemeter.jmeter.rte.sampler.RTESampler.sample(RTESampler.java:460) ~[jmeter-bzm-rte-1.1.1.jar:?]
at org.apache.jmeter.threads.JMeterThread.doSampling(JMeterThread.java:622) ~[ApacheJMeter_core.jar:5.0 r1840935]
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:546) ~[ApacheJMeter_core.jar:5.0 r1840935]
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:486) [ApacheJMeter_core.jar:5.0 r1840935]
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:253) [ApacheJMeter_core.jar:5.0 r1840935]
at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]

Please let me know suggestion on this. Thanks.

Roger Abelenda

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Jun 19, 2019, 4:00:05 PM6/19/19

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The real reason is being hidden, but it seems the real reason is a timeout due to potentially incorrect wait condition (because it is timing out as far as we see on the stack trace) in sampler, and a bug in handling of TN3270 alternate screen dimensions, we will work to fix the later one. Can you try changing the default wait condition in your sampler? Try for example using a wait for silent (wait for text, due to existing bug on alternate screen dimensions, should manifest in similar NPE error) in the sampler with a proper period.

Regards

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sts...@gmail.com

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Jul 8, 2019, 4:59:30 PM7/8/19

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Thanks a lot Roger for your response. I have tried different "Wait for" options and still facing the same issue. Please find below the response for each of those options and let me know if there is any ETA for the bug fix.

Option 1 - Wait for Cursor?

Response:

2019-07-08 16:58:13,180 ERROR o.a.j.JMeter: Uncaught exception:

java.lang.NullPointerException: null

at com.bytezone.dm3270.display.Screen.setCurrentScreen(Screen.java:94) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.commands.WriteCommand.process(WriteCommand.java:58) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.extended.TN3270ExtendedCommand.process(TN3270ExtendedCommand.java:43) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.streams.TelnetListener.processMessage(TelnetListener.java:176) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.streams.TelnetListener.addDataRecord(TelnetListener.java:171) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.streams.TelnetListener.processRecord(TelnetListener.java:105) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.telnet.TelnetProcessor.listen(TelnetProcessor.java:62) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.streams.TelnetListener.listen(TelnetListener.java:56) ~[dm3270-lib-0.7.jar:?]

at com.bytezone.dm3270.streams.TerminalServer.run(TerminalServer.java:71) ~[dm3270-lib-0.7.jar:?]

at java.lang.Thread.run(Unknown Source) [?:1.8.0_211]

2019-07-08 16:58:13,243 DEBUG o.a.j.v.ViewResultsFullVisualizer: Expanded: [[Root]]

2019-07-08 16:58:13,243 DEBUG o.a.j.v.ViewResultsFullVisualizer: Elements: [Root]

2019-07-08 16:58:23,143 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Inputs:

(20, 20): GB2TSTE

(21, 20): PASS0619

2019-07-08 16:58:23,143 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - AttentionKey sent: ENTER

2019-07-08 16:58:23,143 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Request Headers: Server: mainframei

Port: 23

Protocol: TN3270

Terminal-type: IBM-3278-M4-E: 43x80

Security: NONE

Action: SEND_INPUT

Input-inhibited: false

2019-07-08 16:58:23,143 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Response Headers:

2019-07-08 16:58:23,143 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Response Screen:

2019-07-08 16:58:23,143 ERROR o.a.j.t.JMeterThread: Error while processing sampler: 'Login To region - RTE Sampler'.

java.lang.NullPointerException: null

2019-07-08 16:58:23,144 DEBUG o.a.j.c.GenericController: Calling next on: class org.apache.jmeter.control.GenericController

2019-07-08 16:58:23,144 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Inputs:

(9, 4): S

2019-07-08 16:58:23,144 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - AttentionKey sent: ENTER

2019-07-08 16:58:23,144 DEBUG c.b.j.r.s.RTESampler: Thread Group 1-1 - Request Headers: Server: mainframei

Port: 23

Protocol: TN3270

Terminal-type: IBM-3278-M4-E: 43x80

Security: NONE

Action: SEND_INPUT

Input-inhibited: true

Option 2 - Wait for Silent? Interval - 1000 and Timeout - 20000

Response:

019-07-08 16:57:13,483 ERROR o.a.j.JMeter: Uncaught exception: