Error while creating Publisher Export

I am trying to create publisher export of the aris database, but getting the error attached below. 

Please help.

- Original request query: /businesspublisher/remoting/bpDataTransfer/writeChunkTerminated
IT_15d63dde7b5_SEVERE  2017-07-21T12:07:53,461 Enterprise ProcessWeb: Rollback export triggered from external
- Original request query: /businesspublisher/remoting/bpDataTransfer/rollBackExport
IT_15d63ddeaf1_WARNING  2017-07-21T12:07:54,289 Enterprise ProcessWeb: rollback export
- Original request query: /businesspublisher/remoting/bpDataTransfer/rollBackExport
IT_15d63ddeaf1_WARNING  2017-07-21T12:07:54,289 Enterprise ProcessWeb: SQLException in ABPExportNew::rollbackExport; message: PooledConnection has already been closed.
- Original request query: /businesspublisher/remoting/bpDataTransfer/rollBackExport