Tomcat maxPostSize setting implementation process analysis

1. Why set maxPostSize?

The tomcat container has a limit on the size of the transmitted data. If a file exceeding this value is uploaded, an error will be reported, making the program unable to be used normally.

2. Setting method

Find /conf/server.xml in the tomcat directory and add the maxPostSize parameter to it

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The parameter value "-1" means no size limit. Not setting the maxPostSize parameter means using the default size, which is 2097152 bytes, or 2 megabytes.

3. Notes on setting values

One thing to note is that when there is no limit on the size of transmitted data under different versions of Tomcat, the value of maxPostSize is not the same!

Specific differences:

Before tomcat7.0.63, setting maxPostSize to a value less than or equal to 0 means no limit

In tomcat7.0.63 and later, setting maxPostSize to a value less than 0 indicates no limit

If you set maxPostSize="0" after tomcat7.0.63, the transmitted data will not be obtained.

4. Official Documentation

Attach tomcat changeLog

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