Can ThreadLocal cause memory leak?

Memory leak is caused when ThreadLocal is always existing. If ThreadLocal object could be GC, it will not cause memory leak. Because the entry in ThreadLocalMap extends WeakReference, the entry will be GC after ThreadLocal object is GC.

Why does memory leak occur in C++?

Memory leaks occur when new memory is allocated dynamically and never deallocated. In C programs, new memory is allocated by the malloc or calloc functions, and deallocated by the free function. In C++, new memory is usually allocated by the new operator and deallocated by the delete or the delete [] operator.

When does ThreadLocal cause a memory leak in Java?

Those threads can create memory leak if the variables in ThreadLocal are not removed because Threads do not die. This scenario does not mention “Perm Space” memory leak. Is that the only (major) use case of memory leak? PermGen exhaustions in combination with ThreadLocal are often caused by classloader leaks.

What causes memory leaks in C / C + + apps?

Memory leaks are among the most subtle and hard-to-detect bugs in C/C++ apps. Memory leaks result from the failure to correctly deallocate memory that was previously allocated. A small memory leak might not be noticed at first, but over time can cause symptoms ranging from poor performance to crashing when the app runs out of memory.

When does a memory leak occur what happens?

A memory leak occurs when a process allocates memory from the paged or nonpaged pools, but does not free the memory. As a result, these limited pools of memory are depleted over time, causing Windows to slow down. If memory is completely depleted, failures may result. This section includes the following:

How to find memory leaks in the CRT library?

Find memory leaks with the CRT library. Memory leaks are among the most subtle and hard-to-detect bugs in C/C++ apps. Memory leaks result from the failure to correctly deallocate memory that was previously allocated.