Java process memory growing indefinitely. Memory leak?

Question

We have a java process running on Solaris 10 serving about 200-300 concurrent users. The administrators have reported that memory used by process increases significantly over ti

Answer 1

I have encountered a similar problem and found a resolution:

Solaris 11
JDK10
REST application using HTTPS (jetty server)
There was a significant increase of c-heap (observed via pmap) over time

I decided to do some stress tests with libumem. So i started the proces with

UMEM_DEBUG=default UMEM_LOGGING=transaction LD_PRELOAD=libumem.so.1

and stressed the application with https requests. After a while I connected to the process with mdb. In mdb I used the command ::findleaks and it showed this as a leak:

libucrypto.so.1`ucrypto_digest_init

So it seems than the JCA (Java Cryptography Architecture) implementation OracleUcrypto has some issues on Solaris.

The problem was resolved by updating of the $JAVA_HOME/conf/security/java.security file - I changed the priority of OracleUcrypto to 3 and the SUN implementation to 1

security.provider.3=OracleUcrypto
security.provider.2=SunPKCS11 ${java.home}/conf/security/sunpkcs11-solaris.cfg
security.provider.1=SUN

After this the problem dissapeared.

This also explains why there is no problem on linux - since there are different implememntations of JCA providers in play