I have a webapp running in Jetty on Mac OS 10.6.

After a few days of it running and without the server losing power or rebooting, it seems to stop working saying it can't find a properties file.

This properties file is included inside the .war file deployed to the /webapps directory.

If I restart Jetty as the superuser the web service works again just fine.

Can anyone lend any advice to what's going on and how I can fix it? The error being shown when it isn't working is:

Problem accessing /my-web-service. Reason:

    INTERNAL_SERVER_ERROR

Caused by:

java.lang.NullPointerException
    at com.company.service.Dao.readFromPropertiesFile(BwDao.java:35)
    at com.company.service.ServletHandler.doGet(ProxyClass.java:66)
    ...
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

Here's where the properties files exist that it's trying to read from the .war file:

And this is how the properties are being read from the classpath:

  Properties properties = new Properties();
  properties.load(Thread.currentThread().getContextClassLoader().getResourceAsStream(
      "app.properties"));

Again, this does work just fine if I have just restarted the server, but it seems to fail after running a few days.