Thread Locking issue with SmartXLS

Question

WE have been seeing issue with SmartXLS when we run it with multi threaded environment, does anyone have seen issue? we are using java 1.7 SmartXLS 4.6

 java.lang.Thread.State: BLOCKED
    at com.smartxls.a.aj.a(SourceFile:44)
    - waiting to lock <6521da27> (a com.smartxls.a.ai$a) owned by "GS-jobListenerPollingContainer-3" t@70
    at com.smartxls.a.aj.a(SourceFile:38)
    at com.smartxls.a.aj.a(SourceFile:28)
    at com.smartxls.a.de.a(SourceFile:173)
    at com.smartxls.a.de.a(SourceFile:97)
    at com.smartxls.a.y.T(SourceFile:1598)
    at com.smartxls.a.y.Q(SourceFile:1340)
    at com.smartxls.a.bq.a(SourceFile:391)
    at com.smartxls.a.h.b(SourceFile:1220)
    at com.smartxls.a.h.a(SourceFile:279)
    at com.smartxls.ss.af.f(SourceFile:2009)
    at com.smartxls.ss.af.a(SourceFile:2635)
    at com.smartxls.ss.af.b(SourceFile:2673)
    at com.smartxls.ss.af.a(SourceFile:1181)
    at com.smartxls.ss.af.a(SourceFile:1198)
    at com.smartxls.ss.aj.a(SourceFile:7884)
    at com.smartxls.ss.aj.a(SourceFile:7874)
    at com.smartxls.WorkBook.write(SourceFile:2363)

Answer 1

You should use getLock/releaseLock to sync the background thread calculations.

            try
            {
                workbook.getLock();
                workbook.read(...);
                ...
                workbook.write(...);
            }
            finally
            {
                workbook.releaseLock();
            }