JDK 9 build hangs after java.security

[Joe Kutner]

I’m trying to build JDK 9 on Ubuntu using Docker. My build hangs at this point:

> Generating java.security
> Note: Some input files use unchecked or unsafe operations.
> Note: Recompile with -Xlint:unchecked for details.
> Warning: generation and use of skeletons and static stubs for JRMP
> is deprecated. Skeletons are unnecessary, and static stubs have
> been superseded by dynamically generated stubs. Users are
> encouraged to migrate away from using rmic to generate skeletons and static
> stubs. See the documentation for java.rmi.server.UnicastRemoteObject.

How can I can more info to debug the problem?

JDK 9 used to build successfully in this environment (maybe 2 months ago). I’m not sure when this started.

More environment info:

$ uname -a
Linux bc6c6578ed2f 4.0.7-boot2docker #1 SMP Wed Jul 15 00:01:41 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

====================================================
A new configuration has been successfully created in
/tmp/tmp.s8BA5OS8Mj/openjdk9/build/linux-x86_64-normal-server-release
using configure arguments '--with-cacerts-file=/cacerts --with-boot-jdk=/app/opt/java --disable-headful --enable-unlimited-crypto --disable-debug-symbols --with-jvm-variants=server --with-target-bits=64 --with-num-cores=2 --with-milestone=''cedar14_2015-07-15'' --with-update-version=ea --with-build-number=b70'.

Configuration summary:
* Debug level:    release
* HS debug level: product
* JDK variant:    normal
* JVM variants:   server
* OpenJDK target: OS: linux, CPU architecture: x86, address length: 64

Tools summary:
* Boot JDK:       openjdk version "1.8.0_40-cedar14" OpenJDK Runtime Environment (build 1.8.0_40-cedar14-b25) OpenJDK 64-Bit Server VM (build 25.40-b25, mixed mode)  (at /app/opt/java)
* Toolchain:      gcc (GNU Compiler Collection)
* C Compiler:     Version 4.8.2 (at /usr/bin/gcc)
* C++ Compiler:   Version 4.8.2 (at /usr/bin/g++)

Build performance summary:
* Cores to use:   1
* Memory limit:   2002 MB