oacore application.log become more than 2 GB due to message "There is no process to read data writte

Hi

Could you please share me your advice on the following issue.

R12.1.3 environment.In oacore application.log,A lot of message like "There is no process to read data written to a pipe" get generated.

It make the size of application.log become more than 2GB.

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16/04/13 20:51:47.675 html: There is no process to read data written to a pipe

......

16/04/13 21:02:41.544 html:There is no process to read data written to a pipe

java.io.IOException: There is no process to read data written to a pipe

at sun.nio.ch.FileDispatcher.write0(Native Method)

at sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:29)