Data integration: CRON driven scheduling strategy - @OnScheduled method due to java.lang.NullPointerException

[Ilya Bo]

Hi,

I'm testing Syncfusion Data Integration Platform and trying to invoke processor by CRON driven scheduling strategy.

I put into "Run Schedule" field this value: 0 19 22 10 7 ? 2017

But when I start processor I immediately get an error:

failed to invoke @OnScheduled method due to java.lang.NullPointerException

That errors happens with all processors which I try to run by CRON driven scheduling strategy.

Timer driven strategy works ok.

What is the reason?

[Ilya Bo]

From log file:

ERROR [Timer-Driven Process Thread-2] org.apache.hadoop.util.Shell Failed to locate the winutils binary in the hadoop binary path

java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.

  at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:379) [hadoop-common-2.7.3.jar:na]

  at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:394) [hadoop-common-2.7.3.jar:na]

  ....

ERROR [StandardProcessScheduler Thread-1] o.a.n.p.standard.GenerateFlowFile GenerateFlowFile[id=347af75d-b2d1-4460-3037-a4ca4fcd25fb] GenerateFlowFile[id=347af75d-b2d1-4460-3037-a4ca4fcd25fb] failed to invoke @OnScheduled method due to java.lang.NullPointerException; processor will not be scheduled to run for 30 seconds: java.lang.NullPointerException

2017-07-10 23:17:53,844 ERROR [StandardProcessScheduler Thread-1] o.a.n.p.standard.GenerateFlowFile 

java.lang.NullPointerException: null

  at org.apache.nifi.controller.scheduling.QuartzSchedulingAgent.doSchedule(QuartzSchedulingAgent.java:185) ~[na:na]

....

[Krishna Mohan]

Hi Ilya Bo, 

Thank you for contacting Syncfusion Support. 

Please find the below response. 

I put into "Run Schedule" field this value: 0 19 22 10 7 ? 2017  But when I start processor I immediately get an error:  failed to invoke @OnScheduled method due to java.lang.NullPointerException

Given error may be caused due to following two reasons.  If the given CRON expression is invalid. If the given date is in past. Here the given expression “0 19 22 10 7 ? 2017” is valid.   Please, ensure that the entered date and time is forth coming date and time or not, if the processor scheduled to particular date.  Try this CRON expression “0 15 23 12 7 ? 2017” which starts at 11.15 PM on 12th July 2017 (i.e. today).

Below are the few examples for CRON expression. 

CRON – DRIVEN Expression	Meaning	Next Scheduled dates.
0 0 13 12 JUL ? 2017  (or)  0 0 13 12 7 ? 2017	Starts at 1.00 PM on 12th July 2017	Run only once.
0 0 13 12 JUL ? 2017-2020  (or)  0 0 13 12 7 ? 2017-2020	Starts at 1.00 PM on 12th July during the years 2017,2018,2019 and 2020.	Wednesday, July 12, 2017 1:00 PM Thursday, July 12, 2018 1:00 PM Friday, July 12, 2019 1:00 PM Sunday, July 12, 2020 1:00 PM
0 0 13 12 7 ? *  (or)  0 0 13 12 JUL ? *	Starts at 1:00 PM on 12th July on every year	Wednesday, July 12, 2017 1:00 PM Thursday, July 12, 2018 1:00 PM Friday, July 12, 2019 1:00 PM Sunday, July 12, 2020 1:00 PM Monday, July 12, 2021 1:00 PM
0 0 13 * * ? 2017	Starts at 1:00 PM every day during the year 2017	Wednesday, July 12, 2017 1:00 PM Thursday, July 13, 2017 1:00 PM Friday, July 14, 2017 1:00 PM Saturday, July 15, 2017 1:00 PM Sunday, July 16, 2017 1:00 PM

Please let us know, if you need any further assistance. 

Regards, 

Krishna M.