What is the 500 error in java

1. If the number of running users is too large, the pressure on the server is too great, and the server cannot respond, an HTTP500 error will be reported. The problem is solved by reducing the number of users or the duration of the scene.
2. If the place that should be associated is not associated, an HTTP500 error will be reported. The problem is solved by manual or automatic association.
3. If the page, picture, etc. requested during recording cannot be found by the server during playback, an HTTP500 error will be reported. If the page is not important, you can comment it out in the script and the problem will be resolved. For example: in the case of a verification code, although it has been blocked during testing, a request was submitted during recording, but there was no response during playback.
4. If there is a problem with the value during parameterization, an HTTP500 error will be reported. The values ​​in the parameterization list can be tested in the actual application system to eliminate problems.
5. If you replace the application server (replacement of middleware, such as tomcat, websphere, jboss, etc.), or use the originally recorded script to run, it is likely to report an HTTP500 error. Because the processing mechanisms of various application servers are different, and the recorded scripts are also different, the solution is to re-record the script.
6. Windows xp2 is not compatible with ISS components, it may cause HTTP500 error. The problem is solved after adjusting the ISS components.
7. If there is a problem with the writing of the system development program, an HTTP500 error will be reported. For example, some pointer issues have not been handled properly, and there may be null pointers. The problem is solved after modifying the program.
8. If the operation performed in the test needs to insert data into the database, if the table space in the database is full due to the large amount of data, or the buffer pool is too small to meet the data access, etc., it may cause HTTP500 error . Adjust the database, modify the connection pool size, and solve the problem.
There are too many reasons for the 500 error. For me, in most cases, the 500 error occurs because some associations in the code are not done, which leads to errors. Of course, there is a small part of sometimes not paying attention, and the server is open for too long. Long, causing the server to crash. In short, many places need attention