XX:+HeapDumpOnOutOfMemoryError Max file size limit

Question

I\'m running a Java process with the XX:+HeapDumpOnOutOfMemoryError JVM flag and seeing the following output:

java.lang.OutOfMemoryError: Java h         


        

Answer 1

The -XX:+HeapDumpOnOutOfMemoryError command-line option tells the HotSpot VM to generate a heap dump when an allocation from the Java heap or the permanent generation cannot be satisfied. There is no overhead in running with this option, and so it can be useful for production systems where OutOfMemoryError takes a long time to surface.

In order to resolve the specific problem that you are facing, you can use one of the following corrective measures:

Measure 1: XX:HeapDumpSegmentSize

The -XX:HeapDumpSegmentSize option specifies an appropriate segment size when generating a segmented HPROF heap dump.

Format

-XX:HeapDumpSegmentSize=size[k|K][m|M][g|G]

Example

java -XX:+HeapDumpOnOutOfMemory -XX:HeapDumpSegmentSize=512M myApp

Default Values
1 GB

Measure 2 -XX:SegmentedHeapDumpThreshold

The -XX:SegmentedHeapDumpThreshold option generates a segmented heap dump (.hprof file, 1.0.2 format) when the heap usage is larger than the specified size.

The segmented HPROF dump format is required to correctly generate heap dumps containing more than 4 GB of data. If the value of -XX:SegmentedHeapDumpThreshold option is set more than 4 GB, heap dumps may not be generated correctly.

Format
-XX:SegmentedHeapDumpThreshold=size

Example

java -XX:SegmentedHeapDumpThreshold=512M myApp

Default Value
2 GB