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Application down

francis varkey
Ranch Hand

Joined: Sep 13, 2005
Posts: 165
Respected Sir,

I am working in a web application(java 1.4/jsp/struts/postgres/linux/tomcat).Some times our server is going to down. While checking the logs we commonly got the following exception.
--------------------
java.io.FileNotFoundException: /opt/test/logs/test01082008.log (Too many open files)
at java.io.FileOutputStream.openAppend(Native Method)
at java.io.FileOutputStream.<init>(FileOutputStream.java:177)
at java.io.FileOutputStream.<init>(FileOutputStream.java:102)
..............
We are writing the logs in files like "test01082008.log". I am not sure the
'PrintStream' object is closed each time after writing. We are creating the PrintStream object using "new PrintStream(
new BufferedOutputStream(
new FileOutputStream("filename",true))).

Please let me know what may be the cause of this types of exception.Is it related to PrintStream closing problem, or it related to tomcat or operating system or any other reason.

Thanks
Francis
Rob Spoor
Sheriff

Joined: Oct 27, 2005
Posts: 19538
    
  16

The error is quite clear: you have too many open file handles. You should really close all streams / readers / writers when you're done with them. Always.


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