What are the causes and solutions of stack overflow?

Cause: The total capacity of the created objects exceeds the maximum capacity of the heap. Solution: If it is a memory leak, find the specific leak location according to the reference chain of the object that caused the overflow, and modify it; if it is a memory overflow, check the heap parameter settings of the JVM to check whether the life cycle of some objects is too long or the storage is too long. Issues such as unreasonable design will be corrected.

The operating environment of this tutorial: windows7 system, java8 version, DELL G3 computer.

Java Heap Overflow

Cause: The total capacity of the created objects exceeds the maximum capacity of the heap.

Overflow type: java.lang.OutOfMemoryError.

Solution:

• Troubleshoot whether it is caused by memory overflow or memory leak: use performance monitoring tools such as jconsole to obtain a heap memory snapshot and check the cause of the overflow Whether the object is necessary, if not, it is leaking, if it is, it is overflowing.

• Memory leak: Check the GC ROOTS reference chain of the object that caused the overflow, find the specific memory leak location according to the reference chain, and make modifications.

• Memory overflow: Check the JVM's heap parameter settings (-Xmx: JVM maximum memory and -Xms: startup initial memory) to see if there is room for upward adjustment; then start from the code Check whether the life cycle of some objects is too long or the storage design is unreasonable.

  

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