Many open files jndi.properties by JBoss AS 5 process

[petepl]

Hi all,

Last time we recieved that our JBoss AS 5 process is openning a lot of jndi.properties files, and not closing it.

This cause that after few hours we are getting in server.log error "To many open files":

2014-04-30 09:38:18,000 ERROR [org.apache.tomcat.util.net.JIoEndpoint] (http-10.126.191.20-8080-Acceptor-0) Socket accept failed

java.net.SocketException: Too many open files

  at java.net.PlainSocketImpl.socketAccept(Native Method)

  at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:375)

  at java.net.ServerSocket.implAccept(ServerSocket.java:478)

  at java.net.ServerSocket.accept(ServerSocket.java:446)

  at org.apache.tomcat.util.net.DefaultServerSocketFactory.acceptSocket(DefaultServerSocketFactory.java:61)

  at org.apache.tomcat.util.net.JIoEndpoint$Acceptor.run(JIoEndpoint.java:310)

  at java.lang.Thread.run(Thread.java:701)

I know that this problem is connected with limits on linux server. We can of course increase number of opened files by process, but I think that it will only postpone the problem.

On JBoss AS 5 we have got some WebServices which uses Datasources by JNDI.

Could anyone explain why jndi.properties files not closing and how resolve this problem ?

[jaikiran]

How did you narrow it down to jndi.properties being left open? Is there some specific code you found that was causing this issue?

[petepl]

Actually I was thinking about it and I suspect that the problem is when I call Datasource from object Context:

Piece of code is here:

    public static Connection setDataSource(String dataSourceName) throws SQLException, NamingException {

        Context initContext = new InitialContext();

        Context envContext = (Context)initContext.lookup("java:");

        DataSource ds = (DataSource)envContext.lookup(dataSourceName);

        Connection connection = ds.getConnection();

        connection.setAutoCommit(false);

        return connection;

    }

I have found that context should implicity close, but not always

More information here: http://docs.oracle.com/javase/tutorial/jndi/ldap/close.html

Anyway do you think that it could cause a problem ?

[petepl]

Finally we increase limit of maximum number of opened files per process on our server to 2048. After 3 weeks we noticed that the same problem showed up.

Anyone can help ?