Building from source fails with "Thread limit exceeded replacing blocked worker"

[sascha-krug]

Hi,

I tried to build this project from source on a Mac according to the doc.
I git-cloned the repo and and switched to tag v1.46.1 and then executed:

JAVA_HOME=/Library/Java/JavaVirtualMachines/graalvm-community-openjdk-21/Contents/Home/ ./mvnw clean verify -DskipTests=true

which then breaks with:

[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for JDT Language Server :: Parent 1.46.1-SNAPSHOT:
[INFO]
[INFO] JDT Language Server :: Parent ...................... SUCCESS [  0.020 s]
[INFO] JDT Language Server :: Target Platform ............. SUCCESS [  0.003 s]
[INFO] JDT Language Server :: Core ........................ FAILURE [  8.650 s]
[INFO] JDT Language Server :: Filesystem .................. SKIPPED
[INFO] JDT Language Server :: Tests ....................... SKIPPED
[INFO] JDT Language Server :: Java LS Logback.appender .... SKIPPED
[INFO] JDT Language Server :: SyntaxServer Tests .......... SKIPPED
[INFO] JDT Language Server :: Product ..................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  11.358 s
[INFO] Finished at: 2025-05-09T12:05:38+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.gmaven:groovy-maven-plugin:2.1.1:execute (default) on project org.eclipse.jdt.ls.core: Execution default of goal org.codehaus.gmaven:groovy-maven-plugin:2.1.1:execute failed: java.util.concurrent.ExecutionException: java.util.concurrent.RejectedExecutionException: Thread limit exceeded replacing blocked worker -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :org.eclipse.jdt.ls.core

Java info:

java -version
openjdk version "21.0.2" 2024-01-16
OpenJDK Runtime Environment GraalVM CE 21.0.2+13.1 (build 21.0.2+13-jvmci-23.1-b30)
OpenJDK 64-Bit Server VM GraalVM CE 21.0.2+13.1 (build 21.0.2+13-jvmci-23.1-b30, mixed mode, sharing)

Does anyone what's going on?

[rgrunber]

Likely due to the script at

eclipse.jdt.ls/org.eclipse.jdt.ls.core/pom.xml

Lines 39 to 41 in c2cd627

	<groupId>org.codehaus.gmaven</groupId>
	<artifactId>groovy-maven-plugin</artifactId>
	<version>2.1.1</version>

. I've seen it happen as well. Does it happen every time or does it go away if you run the build again ? Might be a reason to consider #3434 .

[sascha-krug]

Well, I tried again. Now things are going to be a little bit crazy:
Using tag 1.46.1 and running
JAVA_HOME=/Library/Java/JavaVirtualMachines/graalvm-community-openjdk-21/Contents/Home/ ./mvnw verify -U -DskipTests=true this time with the "-U" flag (I oversaw it the first time) now brings this error:

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-compiler-plugin:4.0.12:compile (default-compile) on project org.eclipse.jdt.ls.core: Compilation failure: Compilation failure:
[ERROR] /Users/krugs/Projects/eclipse.jdt.ls/org.eclipse.jdt.ls.core/src/org/eclipse/jdt/ls/core/internal/corrections/proposals/LocalCorrectionsSubProcessor.java:[110]
[ERROR]         public class LocalCorrectionsSubProcessor extends LocalCorrectionsBaseSubProcessor<ProposalKindWrapper> {
[ERROR]                      ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[ERROR] The type LocalCorrectionsSubProcessor must implement the inherited abstract method LocalCorrectionsBaseSubProcessor<ProposalKindWrapper>.newLocalVariableCorrectionProposalToT(NewLocalVariableCorrectionProposalCore, int)
[ERROR] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoFailureException
[ERROR]
[ERROR] After correcting the problems, you can resume the build with the command
[ERROR]   mvn <args> -rf :org.eclipse.jdt.ls.core

BUT: when checking out the todays main branch and running the same script, it finish successfully.