This error message indicates that there is not enough memory available for the Java Runtime Environment to continue. The error message suggests several possible reasons, including running out of physical RAM or swap space, a blocked native heap due to CompressedOops being enabled, or a full swap backing store. It also offers several potential solutions such as reducing memory load on the system, increasing physical memory or swap space, decreasing Java heap size, and decreasing the number of Java threads. Other suggestions include setting a larger code cache or using Unscaled Compressed Oops mode with -XX:HeapBaseMinAddress. The thread causing the issue is a C2 CompilerThread0 daemon trying to compile java.util.HashMap::putMapEntries.
