First, what is the OOM?
OOM (out of memory) memory overflow, the memory is used up.
Official Description: Thrown when the Java Virtual Machine can not allocate an object because it is out of memory, and no more memory could be made available by the garbage collector means is that when the JVM because there is not enough memory to and allocated for the object space. when the garbage collector has no space recyclable, it will throw this error (Note: non-exception, because this problem has been serious enough to be applied to the process).
Second, what has led OOM? How to solve?
