Opatchauto failed with OUI-67073 :UtilSession failed: I/O error (Doc ID 2514631.1)

[INFO] OPatch invoked as follows: 'napply /grid/stage1/28429134/28204707 -local -silent -ocmrf /grid/stage1/ocm.rsp -oh <GRID_HOME> -invPtrLoc <GRID_HOME>/oraInst.loc '

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Is the local system ready for patching? [y|n]

Y (auto-answered by -silent)
User Responded with: Y
Backing up files...
UtilSession failed: I/O error  >>>>>> HERE
Log file location: <GRID_HOME>/cfgtoollogs/opatch/opatch2019-02-15_02-51-39AM_1.log

OPatch failed with error code 73

[Feb 15, 2019 2:51:56 AM] [INFO] Please shutdown Oracle instances running out of this ORACLE_HOME on the local system.
(Oracle Home = '/grid/11.2.0.4')
[Feb 15, 2019 2:51:56 AM] [INFO] Is the local system ready for patching? [y|n]
[Feb 15, 2019 2:51:56 AM] [INFO] Y (auto-answered by -silent)
[Feb 15, 2019 2:51:56 AM] [INFO] User Responded with: Y
[Feb 15, 2019 2:51:56 AM] [INFO] Backing up files...
[Feb 15, 2019 2:51:56 AM] [INFO] OUI-67117:Backing up files affected by the patch 'NApply' for restore. This might take a while...
[Feb 15, 2019 2:52:05 AM] [SEVERE] OUI-67073:UtilSession failed: I/O error
[Feb 15, 2019 2:52:05 AM] [INFO] Finishing UtilSession at Fri Feb 15 02:52:05 EET 2019
[Feb 15, 2019 2:52:05 AM] [INFO] Log file location: <GRID_HOME>/cfgtoollogs/opatch/opatch2019-02-15_02-51-39AM_1.log
[Feb 15, 2019 2:52:05 AM] [INFO] Stack Description: java.lang.RuntimeException: I/O error
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.FileDispatcher.pwrite0(Native Method)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.FileDispatcher.pwrite(FileDispatcher.java:45)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:65)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.IOUtil.write(IOUtil.java:26)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.FileChannelImpl.write(FileChannelImpl.java:638)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.FileChannelImpl.transferFromFileChannel(FileChannelImpl.java:529)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.nio.ch.FileChannelImpl.transferFrom(FileChannelImpl.java:590)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.SystemCall.fastCopy(SystemCall.java:293)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.SystemCall.backupFile(SystemCall.java:1253)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.ArchiveAction.backupForRestore(ArchiveAction.java:871)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.MergedPatchObject.backupForRestore(MergedPatchObject.java:1630)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.opatchutil.NApply.legacy_process(NApply.java:1085)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.opatchutil.NApply.legacy_process(NApply.java:347)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.opatchutil.NApply.process(NApply.java:335)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.opatchutil.OUSession.napply(OUSession.java:1102)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: java.lang.reflect.Method.invoke(Method.java:597)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.UtilSession.process(UtilSession.java:352)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.OPatchSession.process(OPatchSession.java:2537)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.OPatch.process(OPatch.java:821)
[Feb 15, 2019 2:52:05 AM] [INFO] StackTrace: oracle.opatch.OPatch.main(OPatch.java:871)