UCM error IDCService

Hello

Does anybody have an idea about this error that UCM logs are showing me ?!! the IDCService is going down every time this eerrror happens..

 server1: Error with touchFile for /content/oracle/ucm/server/data/subjects/indexerstatus.mrk. /content/oracle/ucm/server/data/subjects/indexerstatus.mrk (Too many open files) java.io.FileNotFoundException: /content/oracle/ucm/server/data/subjects/indexerstatus.mrk (Too many open files) [ Details ]

An error has occurred. The stack trace below shows more information.

!$server1: !syFileUtilsTouchError,/content/oracle/ucm/server/data/subjects/indexerstatus.mrk!$/content/oracle/ucm/server/data/subjects/indexerstatus.mrk (Too many open files)!syExceptionType2,java.io.FileNotFoundException,/content/oracle/ucm/server/data/subjects/indexerstatus.mrk (Too many open files)
java.io.FileNotFoundException: /content/oracle/ucm/server/data/subjects/indexerstatus.mrk (Too many open files)
	at java.io.FileOutputStream.open(Native Method)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:205)
	at java.io.FileOutputStream.<init>(FileOutputStream.java:157)
	at java.io.FileWriter.<init>(FileWriter.java:96)
	at intradoc.common.FileUtils.touchFile(FileUtils.java:1550)
	at intradoc.server.SubjectManager.touchInternalChanged(SubjectManager.java:636)
	at intradoc.server.SubjectManager.checkForChange(SubjectManager.java:172)
	at intradoc.server.SubjectManager.monitor(SubjectManager.java:140)
	at intradoc.server.SubjectManager$1.run(SubjectManager.java:98)
	at java.lang.Thread.run(Thread.java:797)