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'OutOfMemoryError': Usually, this error is thrown when there is insufficient space to allocate an object in the Java heap.
GC (Allocation Failure): Allocation Failure” means that there is an allocation request that is bigger than the available space in young generation.
Does this mean Allocation Failure will be thrown when Young generation memory is full (Minor GC) and "OutOfMemoryError" is thrown in full GC?
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A GC allocation failure means that the garbage collector could not move objects from young gen to old gen fast enough because it does not have enough memory in old gen. This can cause application slowness.
This 'Allocation failure' log is not an error but is a totally normal case in JVM. This is a typical GC event which causes the Java Garbage Collection process to get triggered. Garbage Collection removes dead objects, compact reclaimed memory and thus helps in freeing up memory for new object allocations.
These 'Allocation Failures' are not an error but it is a totally normal case in the JVM. There are java logs indicating that it ran out of heap space and triggered GC. The 'Allocation Failure' happens when there is not enough space to create new objects in Young Generation.
These could become related as far as I can tell; but they are entirely different things.
OutOfMemory is an error you can not recover from - the JVM will die at this point.
GC (Allocation Failure): Allocation Failure is the reason why GC will kick in (and do a minor collection). At this point some things might happen, like: enough space is freed for the new allocation to fit into young generation. Or that did not happen and some objects will be promoted to the old generation. If they can't be promoted, a full GC might be triggered - and if that does not free enough space an OutOfMemory might be thrown.
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