11.5.10.2 :Patch 11I.HR_PF.K.DELTA.7 fails on XDOLoader.class with Exception in thread "main" java.

Hi,

The workers are failing while applying patch # 12807777

2807777: 11I.HR_PF.K.DELTA.7 : errors
Problem Summary
---------------------------------------------------
Error While applying Patch# 12807777

12807777_2.log


ATTENTION: All workers either have failed or are waiting:

       FAILED: file XDOLoader.class on worker  1.
       FAILED: file XDOLoader.class on worker  2.
       FAILED: file XDOLoader.class on worker  3.
       FAILED: file XDOLoader.class on worker  4.
       FAILED: file XDOLoader.class on worker  5.
       FAILED: file XDOLoader.class on worker  6.
       FAILED: file XDOLoader.class on worker  7.
       FAILED: file XDOLoader.class on worker  8.
       FAILED: file XDOLoader.class on worker  9.
       FAILED: file XDOLoader.class on worker 10.


Worker log file are all showing this error :
-----------------------------