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Application down

francis varkey
Ranch Hand

Joined: Sep 13, 2005
Posts: 169
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.

Rob Spoor

Joined: Oct 27, 2005
Posts: 19672

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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jQuery in Action, 2nd edition
subject: Application down