Case study caused by an http500 Error

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Case 1: problems caused by resources (experimental virtual machines)

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Small Problems Encountered in was cluster exercises:

For was cluster exercises, the http500 error is displayed, as shown in:

Resources are located at http500, with fewer resources allocated to virtual machines in the experiment environment. As a result, the memory of the was Cluster Server is increased from 1 GB to 2 GB, the server is restarted, and the application is successfully logged on. The problem is solved.

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Case 2: problems caused by network connection (experimental virtual machine)

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The following error is reported when a Web client logs on to an application deployed on a single was node:

Check the was service, which is normal, such:

Check the JAVA process. The process is normal, for example:

View Application Status: started, normal, as shown below:

Database connection test: failed!

On the application server, the database server cannot be pinged, as shown below:

Modify the VM connection mode:

After modification, as shown in:

Ping the database server from the application server again, as shown in figure:

Test the database connection again in was. The connection is successful, as shown in:

At this time, the client Web login is successful.

 

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Case 3: monitoring problems (production environment)

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Problem Review: "HTTP 500 error" is reported during client login ". It is found that the listener is not started normally, and the client cannot connect to the database.

Solution: reconfigure the listener, start the listener, and use the client to log on again for verification. The connection is normal.

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Original article:

Blog: http://blog.csdn.net/huangyanlong

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Case study caused by an http500 Error