Yes this bug is known and tracked by JDK-8277681. The proper solution
should make each JdepsTask to maintain its own map of multi-versioned
entries rather than a global nameToVersion map for the running VM as
described in
JDK-8277681.
Mandy
On 12/18/21 7:47 PM, Raymond Augé wrote:
Hello everyone,
At Alan's request [3] I'm posting this here. Alan mentions this is likely a
manifestation of JDK-8277681 [4]. From the description I would agree.
Here is a copy of the original message for posterity.
-------------------
I believe I have found a small bug in jdeps tool when used as ToolProvider.
I am invoking the jdeps impl via the ToolProvider API as follows (this code
is also available here [2]):
try (final StringWriter stdout = new StringWriter();
final StringWriter stderr = new StringWriter();
final PrintWriter pwout = new PrintWriter(stdout);
final PrintWriter pwerr = new PrintWriter(stderr)) {
return (ToolProvider.findFirst("jdeps").orElseThrow().run(pwout, pwerr,
args) == 0) ?
stdout.toString() :
"Error: ".concat(stderr.toString());
}
catch (Throwable t) {
t.printStackTrace();
return "Error: " + t.getMessage();
}
However repeat invocations result in the following exception:
java.lang.Error: java.util.concurrent.ExecutionException:
com.sun.tools.jdeps.MultiReleaseException
at
jdk.jdeps/com.sun.tools.jdeps.DependencyFinder.waitForTasksCompleted(DependencyFinder.java:271)
at
jdk.jdeps/com.sun.tools.jdeps.DependencyFinder.parse(DependencyFinder.java:133)
at jdk.jdeps/com.sun.tools.jdeps.DepsAnalyzer.run(DepsAnalyzer.java:129)
at
jdk.jdeps/com.sun.tools.jdeps.ModuleExportsAnalyzer.run(ModuleExportsAnalyzer.java:74)
at
jdk.jdeps/com.sun.tools.jdeps.JdepsTask$ListModuleDeps.run(JdepsTask.java:1047)
at jdk.jdeps/com.sun.tools.jdeps.JdepsTask.run(JdepsTask.java:574)
at jdk.jdeps/com.sun.tools.jdeps.JdepsTask.run(JdepsTask.java:533)
at jdk.jdeps/com.sun.tools.jdeps.Main.run(Main.java:64)
at jdk.jdeps/com.sun.tools.jdeps.Main$JDepsToolProvider.run(Main.java:73)
[snip]
Caused by: java.util.concurrent.ExecutionException:
com.sun.tools.jdeps.MultiReleaseException
at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
at
jdk.jdeps/com.sun.tools.jdeps.DependencyFinder.waitForTasksCompleted(DependencyFinder.java:267)
... 24 more
Caused by: com.sun.tools.jdeps.MultiReleaseException
at jdk.jdeps/com.sun.tools.jdeps.VersionHelper.add(VersionHelper.java:62)
at
jdk.jdeps/com.sun.tools.jdeps.ClassFileReader$JarFileReader.readClassFile(ClassFileReader.java:360)
at
jdk.jdeps/com.sun.tools.jdeps.ClassFileReader$JarFileIterator.hasNext(ClassFileReader.java:402)
at
jdk.jdeps/com.sun.tools.jdeps.DependencyFinder.lambda$parse$5(DependencyFinder.java:179)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
In order to get around the error I do the following:
public static final Field field;
public static final Map<?,?> map;
static {
try {
Class<?> clazz = Class.forName("com.sun.tools.jdeps.VersionHelper");
field = clazz.getDeclaredField("nameToVersion");
field.setAccessible(true);
map = (Map<?,?>)field.get(null);
}
catch (ReflectiveOperationException e) {
throw new RuntimeException(e);
}
}
and tack a finally to the end of the try above:
finally {
map.clear();
}
Now, additionally to be able to do that, I need to add an `--add-opens`:
--add-opens jdk.jdeps/com.sun.tools.jdeps=ALL-UNNAMED
I believe the solution is to clear the map in [1] when jdeps finishes.
Finally, I would send a PR myself except I do not (yet) have an OCA and the
solution seems simple enough if someone can confirm that this is indeed a
bug.
Ray
[1]
https://github.com/openjdk/jdk/blob/master/src/jdk.jdeps/share/classes/com/sun/tools/jdeps/VersionHelper.java
[2]https://gist.github.com/rotty3000/d9feec79a66f14c2360fee9b9a1b2852
[3]
https://mail.openjdk.java.net/pipermail/jdk-dev/2021-December/006291.html
[4]https://bugs.openjdk.java.net/browse/JDK-8277681
