Why JanusGraphServer can't start

[FantasticCode2019]

I have used this package(janusgraph-full-0.6.2.zip).The JanusGraph application runs on a virtual machine.But the JVM can't allocate memory.Please give some suggestion and Thanks for you.
Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000006c5330000, 4207738880, 0) failed; error='Cannot allocate memory' (errno=12)
There is insufficient memory for the Java Runtime Environment to continue.
Native memory allocation (mmap) failed to map 4207738880 bytes for committing reserved memory.

[vtslab]

Some questions:

• What command(s) do you issue to "run the JanusGraph application"? If you use bin/janusgraph.sh can you please show the full terminal log.
• What memory does your VM have available? The 4GB in the error log is about the default max heap size of the JVM.

[FantasticCode2019]

thanks,I get it.I solved this problem by reducing the JVM's default max stack size.