How to resolve JVM out of Memory error when you read, encrypt and write large file using File connector and Crypto Module.

Problem:

I'm getting JVM out of Memory error when the flow read a large file of size 500MB from a local file system, encypt the file using JCE password based encryption and write the encrypted payload into the same local file sytem. Without the encryption message processor, I could able to read and write a file of size 2GB or more, which means the problem occurs only when we include JCE encryption message processor.

Following is the flow to reproduce the problem

http Listener -> Read(file) -> JCE pbe(payload) -> Write(file)

Environment:

Anypoint Studio = 7.4.0

Mule Server = 4.2.2 EE

File connector = 1.3.2

Crypto = 1.3.2

Error:

java.lang.OutOfMemoryError: Java heap space

Dumping heap to java_pid13928.hprof ...

Heap dump file created [646812541 bytes in 15.692 secs]