2305045 - FILE Adapter is not processing files because of LockException

You experience that the File Channel is not processing files. In the debug level trace of the File Adapter you find the following exception:

[EXCEPTION]
com.sap.engine.frame.core.locking.LockException: Cannot lock [I2015101723441837200000p701a000..................144518350, $XIAFFileHandle, [Name of the corresponding key.], X]; it is in use by the same owner. In case of lock mode "R" the lock propagation failed, because the optimistic lock is gone.
at com.sap.engine.core.locking.impl3.LockingManagerImpl.lockInternal(LockingManagerImpl.java:174)
at com.sap.engine.core.locking.AbstractLockingManagerImpl.lock(AbstractLockingManagerImpl.java:466)
at com.sap.engine.core.locking.ServerInternalLockingImpl.lock(ServerInternalLockingImpl.java:52)
at com.sap.aii.adapter.file.util.locking.LockManager.acquireLock(LockManager.java:249)
at com.sap.aii.adapter.file.util.locking.LockManager.acquireLock(LockManager.java:173)
at com.sap.aii.adapter.file.io.FileHandle.acquireLock(FileHandle.java:106)
at com.sap.aii.adapter.file.File2XI.processFtpList(File2XI.java:2204)
at com.sap.aii.adapter.file.File2XI.invoke(File2XI.java:660)
at com.sap.aii.af.lib.scheduler.JobBroker$Worker.run(JobBroker.java:529)
at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
at java.security.AccessController.doPrivileged(Native Method)
at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java:185)
at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:302)

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• PI Release Independent
• SAP NetWeaver
• SAP Process Integration

SAP NetWeaver 2004 ; SAP NetWeaver 7.0 ; SAP NetWeaver 7.3 ; SAP NetWeaver 7.4 ; SAP NetWeaver 7.5 ; SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 1 for SAP NetWeaver 7.0 ; SAP enhancement package 1 for SAP NetWeaver 7.3 ; SAP enhancement package 1 for SAP NetWeaver Process Integration 7.1 ; SAP enhancement package 2 for SAP NetWeaver 7.0 ; SAP enhancement package 3 for SAP NetWeaver 7.0

LockException, File, com.sap.engine.frame.core.locking.LockException, acquire lock for key, NFS, FTP, Process Integration 7.0, PI 7.0, PI 7.01, PI 7.02, Process Integration 7.10, PI 7.10, Process Integration 7.11, PI 7.11, Process Integration 7.30, PI 7.30, Process Integration 7.31, PI 7.31, Process Orchestration 7.40, PI 7.40, PO 7.40, Process Orchestration 7.50, PI 7.50, PO 7.50, NetWeaver, XI , KBA , BC-XI-CON-FIL , File Adapter , Problem