Backup failed due to an IOException.

2016-04-19 02:32:47,826 ERROR [scheduler_Worker-3] [ScheduledBackupJob] de.schlichtherle.truezip.fs.FsSyncException: zip:file:/data/bamboo-home/backups/bamboo_backup_2016_04_19.zip!/
de.schlichtherle.truezip.fs.FsSyncException: zip:file:/data/bamboo-home/backups/bamboo_backup_2016_04_19.zip!/
        at de.schlichtherle.truezip.fs.FsTargetArchiveController.close(FsTargetArchiveController.java:544)
        at de.schlichtherle.truezip.fs.FsTargetArchiveController.sync(FsTargetArchiveController.java:433)
        at de.schlichtherle.truezip.fs.FsContextController.sync(FsContextController.java:205)
        at de.schlichtherle.truezip.fs.FsResourceController.sync(FsResourceController.java:77)
        at de.schlichtherle.truezip.fs.FsCacheController.sync(FsCacheController.java:217)
        at de.schlichtherle.truezip.fs.FsSyncController.sync(FsSyncController.java:232)
        at de.schlichtherle.truezip.fs.FsLockController$1Sync.call(FsLockController.java:235)
        at de.schlichtherle.truezip.fs.FsLockController$1Sync.call(FsLockController.java:232)
        at de.schlichtherle.truezip.fs.FsLockController.locked(FsLockController.java:328)
        at de.schlichtherle.truezip.fs.FsLockController.writeLocked(FsLockController.java:268)
        at de.schlichtherle.truezip.fs.FsLockController.sync(FsLockController.java:240)
        at de.schlichtherle.truezip.fs.archive.zip.KeyController.sync(KeyController.java:128)
        at de.schlichtherle.truezip.fs.FsDecoratingController.sync(FsDecoratingController.java:131)
        at de.schlichtherle.truezip.fs.FsFalsePositiveArchiveController.sync(FsFalsePositiveArchiveController.java:480)
        at de.schlichtherle.truezip.fs.FsManager.sync(FsManager.java:105)
        at de.schlichtherle.truezip.file.TVFS.sync(TVFS.java:284)
        at de.schlichtherle.truezip.file.TVFS.sync(TVFS.java:231)
        at de.schlichtherle.truezip.file.TFile.sync(TFile.java:949)
        at de.schlichtherle.truezip.file.TFile.umount(TFile.java:997)
        at com.atlassian.bamboo.migration.XmlMigrator.exportXml(XmlMigrator.java:545)
        at com.atlassian.bamboo.migration.XmlMigrator$$FastClassBySpringCGLIB$$b6578fc7.invoke(<generated>)
        at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
        at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:708)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
        at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:98)
        at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:262)
        at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:95)
        at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
        at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:644)
        at com.atlassian.bamboo.migration.XmlMigrator$$EnhancerBySpringCGLIB$$9e560555.exportXml(<generated>)
        at com.atlassian.bamboo.migration.ImportExportManagerImpl.bambooExport(ImportExportManagerImpl.java:94)
        at com.atlassian.bamboo.configuration.ScheduledBackupJob.execute(ScheduledBackupJob.java:75)
        at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
        at com.atlassian.bamboo.utils.BambooRunnables$1.run(BambooRunnables.java:49)
        at com.atlassian.bamboo.security.ImpersonationHelper.runWith(ImpersonationHelper.java:31)
        at com.atlassian.bamboo.security.ImpersonationHelper.runWithSystemAuthority(ImpersonationHelper.java:20)
        at com.atlassian.bamboo.security.ImpersonationHelper$1.run(ImpersonationHelper.java:52)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:525)
Caused by: java.io.IOException: This multiplexed output shop is still busy with writing a stream!
        at de.schlichtherle.truezip.socket.MultiplexedOutputShop.close(MultiplexedOutputShop.java:154)
        at de.schlichtherle.truezip.socket.DisconnectingOutputShop.close(DisconnectingOutputShop.java:103)
        at de.schlichtherle.truezip.socket.LockOutputShop.close(LockOutputShop.java:70)
        at de.schlichtherle.truezip.fs.FsTargetArchiveController.close(FsTargetArchiveController.java:539)
        ... 37 more