title: Documentum.cmis.too many open files error
body: <p>We have deployed our application on rhel 7 from rhel 6 and after deployment we are seeing following error in the catalina.properties, due to this my vm link is getting down frequently. We are using Documentum CMIS 16.4 version on tomcat 8.5 version.</p>
  
  <p><strong><em>Following is the error's details:</em></strong></p>
  
  <pre><code>27-Nov-2018 01:57:00.536 SEVERE [https-jsse-nio-0.0.0.0-12510-Acceptor-0] org.apache.tomcat.util.net.NioEndpoint$Acceptor.run Socket accept failed
   java.io.IOException: Too many open files
          at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
          at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:422)
          at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:250)
          at org.apache.tomcat.util.net.NioEndpoint$Acceptor.run(NioEndpoint.java:457)
          at java.lang.Thread.run(Thread.java:748)
  </code></pre>
  
  <p><strong><em>Here are my efforts in order to solve this problem:</em></strong> 
  I have increased ulimit value from 1024 to 8192 for specific user and rebooted it, recycled tomcat service but nothing happened. I had done changed to file named <code>/etc/security/limits.d/20-nproc.conf/20-nproc.conf</code>. kindly help here.</p>