RFR: 8255801: Race when building ct.sym build tools

Tue Nov 3 13:59:55 UTC 2020

On Tue, 3 Nov 2020 13:39:19 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> There is a race when compiling build.tools.symbolgenerator.CreateSymbols:
> 
> [2020-11-03T07:21:12,118Z] Error: LinkageError occurred while loading main class build.tools.symbolgenerator.CreateSymbols
> [2020-11-03T07:21:12,119Z] java.lang.ClassFormatError: Truncated class file
> [2020-11-03T07:21:12,125Z] Gendata.gmk:69: recipe for target '/.../build/macosx-x64-open/support/javadoc-symbols/symbols' failed
> [2020-11-03T07:21:12,125Z] make[3]: *** [/.../build/macosx-x64-open/support/javadoc-symbols/symbols] Error 1
> [2020-11-03T07:21:12,127Z] make/Main.gmk:148: recipe for target 'jdk.javadoc-gendata' failed
> [2020-11-03T07:21:12,127Z] make[2]: *** [jdk.javadoc-gendata] Error 2
> [2020-11-03T07:21:12,127Z] make[2]: *** Waiting for unfinished jobs....
> 
> This was caused by https://bugs.openjdk.java.net/browse/JDK-8216497, which started compiling the same buildtool twic, in different, independent makefiles, to the same output directory.
> 
> The long term correct solution is to fix https://bugs.openjdk.java.net/browse/JDK-8241463.
> 
> For now, I opted to just make sure the output is placed in separate directories to avoid the race. We will still compile the build tool twice; it's annoying but not a major performance problem.

Marked as reviewed by erikj (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/1037