Native memory leak in StringTable::intern using G1

[Will Bertelsen]

Hi All,

I've been experimenting with G1 in production and have noticed a large
native memory leak that eventually exhausts all memory on the system. I ran
it overnight with NMT enabled and this was the biggest offender:

[0x00007f86c31cf205] Hashtable<oopDesc*, (MemoryType)9>::new_entry(unsigned
int, oopDesc*)+0x165
[0x00007f86c35dd263] StringTable::basic_add(int, Handle, unsigned short*,
int, unsigned int, Thread*)+0xd3
[0x00007f86c35dd452] StringTable::intern(Handle, unsigned short*, int,
Thread*)+0x182
[0x00007f86c35dd921] StringTable::intern(oopDesc*, Thread*)+0x131
                             (malloc=2628520KB +2601784KB #328565 +325223)

Has anyone seen this before?

Here is my java version and gc settings:

java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

-Xmx16384M
-Xms16384M
-XX:+AggressiveOpts
-XX:+UnlockExperimentalVMOptions

-XX:+UseG1GC
-XX:G1HeapRegionSize=8M
-XX:G1NewSizePercent=20
-XX:G1MaxNewSizePercent=80

-XX:MaxGCPauseMillis=250
-XX:MaxMetaspaceSize=1G
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.openjdk.java.net/pipermail/hotspot-gc-use/attachments/20170221/9608d0e4/attachment.html>