Jasper report thread was in a stuck mode for over an hour

[deborupa0402]

We have a report generation job , with an average execution time of 2 mins and generates 10-12 reports. The job fetches the necessary data from DB and then uses multithreading to generate the reports. 
Last week the job generated 3 reports and then got stuck for over an hour. We took the thread dump [ attached below] and other VM stats like memory , cpu and everything was normal. We killed the job and restarted it and it got executed
in its normal time [1:11min] and generated 8 reports. On thread dump analysis we found the thread for jasper report was present for nearly an hour [ we took the dump at around 50 mins ] . 

Is there any issue from jasper report writter than can cause this , especially the "AbstractThreadSubreportRunner" ? 

We use OpenJDK and jasper jar version 6.0.0

Thanks in advance for any help. 

"pool-2-thread-1" #23 prio=5 os_prio=0 cpu=11702.10ms elapsed=2958.36s tid=0x00007fc4a8251000 nid=0x2897 in Object.      wait()  [0x00007fc534166000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(java.base@11.0.2/Native Method)
        - waiting on <no object reference available>
        at java.lang.Object.wait(java.base@11.0.2/Object.java:328)
        at net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.waitResult(AbstractThreadSubreportRunner.                                                                          java:81)
        at net.sf.jasperreports.engine.fill.AbstractThreadSubreportRunner.resume(AbstractThreadSubreportRunner.java                                                                          :68)
        at net.sf.jasperreports.engine.fill.JRFillSubreport.prepare(JRFillSubreport.java:812)
        - waiting to re-lock in wait() <0x000000043c814e28> (a net.sf.jasperreports.engine.fill.JRVerticalFiller)
        at net.sf.jasperreports.engine.fill.JRFillElementContainer.prepareElements(JRFillElementContainer.java:331)
        at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:383)
        at net.sf.jasperreports.engine.fill.JRFillBand.fill(JRFillBand.java:358)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillColumnBand(JRVerticalFiller.java:2058)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillDetail(JRVerticalFiller.java:754)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReportStart(JRVerticalFiller.java:264)
        at net.sf.jasperreports.engine.fill.JRVerticalFiller.fillReport(JRVerticalFiller.java:124)
        - locked <0x000000043d5c0af0> (a net.sf.jasperreports.engine.fill.JRVerticalFiller)
        at net.sf.jasperreports.engine.fill.JRBaseFiller.fill(JRBaseFiller.java:540)
        at net.sf.jasperreports.engine.fill.BaseReportFiller.fill(BaseReportFiller.java:411)
        at net.sf.jasperreports.engine.fill.JRFiller.fill(JRFiller.java:116)
        at net.sf.jasperreports.engine.JasperFillManager.fill(JasperFillManager.java:668)
        at net.sf.jasperreports.engine.JasperFillManager.fillReport(JasperFillManager.java:984)

[pavankalburgi17]

Hi,

I am also facing the same issue. if you have found any workaround please let me know