RFR: 8267404: vmTestbase/vm/mlvm/anonloader/stress/oome/metaspace/Test.java failed with OutOfMemoryError [v3]

[Jie Fu]

> Hi all,
> 
> vmTestbase/vm/mlvm/anonloader/stress/oome/metaspace/Test.java OOMEs on Oracle's aarch64 platforms.
> The reason is that both -Xmx and -XX:MetaspaceSize are not enough.
> 
> From the original JBS decription of JDK-8267404, the VM OOMEs before the expected OOME in metaspace happened showing that -Xmx256m is not enough.
> 
> Then, @dcubed-ojdk helped me test with -Xmx512, which still OOMEs.
> However, the expected OOME in metaspace was caught this time.
> But a second uncaught OOME in metaspace happened soon, which means -XX:MetaspaceSize=8m is not enough.
> 
> So both -Xmx and -XX:MetaspaceSize should be increased.
> The fix just:
>   - Revert changes about mataspace size setting
>   - Increase -Xmx from 256m to 1g
> 
> -Xmx512m may be OK on Oracle's aarch64 machines, but to make it safer, -Xmx1g is preferred.
> 
> Thanks.
> Best regards,
> Jie

Jie Fu has updated the pull request incrementally with one additional commit since the last revision:

  Increase MaxMetaspaceSize to 512k

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4140/files
  - new: https://git.openjdk.java.net/jdk/pull/4140/files/87791076..b8df6e06

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4140&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4140&range=01-02

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4140.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4140/head:pull/4140

PR: https://git.openjdk.java.net/jdk/pull/4140