Java – how to create a test environment for multithreaded applications

All,

Recently I developed a code, which is said to be a thread safe class Now I say 'so-called' because even after using sync 'ed blocks, immutable data structures and concurrent classes, I can't test the code in some cases due to the JVM's thread scheduling environment That is, I only have test cases on paper, but I can't copy the same test environment Are there any specific instructions or experienced members here to share how to test a multithreaded environment

Solution

First, you can't ensure that testing only your classes is completely thread safe No matter what tests you run, you still need as many experienced eyes as possible to review your code to detect subtle concurrency problems

That is, you can design specific test scenarios and try to cover all possible inter thread timing scenarios, just as you did For this idea (and the general design of thread safe classes), it is recommended to read Java concurrency in practice

In addition, you can run stress tests and execute multiple threads at the same time for a long time The number of threads should exceed a reasonable limit to ensure that thread contention occurs frequently - which increases the possibility of potential concurrency errors over time