Access restriction error in Java language server log

[CLGitDev]

Hi,

I have recently started using VSCode with your extension for a Gradle project, however I come across the "Access restriction" error which was flagged in other issues (#120 and #219). I have tried the proposed solution in those threads but without any luck so far.

Below are few errors that I got:

Access restriction: The type 'Signal' is not API (restriction on required library 'C:\Program Files\JAVA\openjdk11.0.5\lib\jrt-fs.jar'); code: 16777523;
Access restriction: The method 'HttpExchange.getRequestHeaders()' is not API (restriction on required library 'C:\Program Files\JAVA\openjdk11.0.5\lib\jrt-fs.jar'); code: 16777523;

And they are primarily from the below library import:

import sun.misc.Signal;
import sun.misc.SignalHandler;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import com.sun.net.httpserver.HttpServer;

I have integrated below access rule into my build.gradle:

import org.gradle.plugins.ide.eclipse.model.AccessRule

apply plugin: 'java'
apply plugin: 'eclipse'

eclipse {
    classpath {
        file {
            whenMerged {
                def jre = entries.find { it.path.contains 'org.eclipse.jdt.launching.JRE_CONTAINER' }
                jre.accessRules.add(new AccessRule('accessible', 'sun/misc/**'))
                jre.accessRules.add(new AccessRule('accessible', 'com/sun/net/**'))
            }
        }
    }
}

And the generated .classpath is as follows:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
	<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-11/">
		<accessrules>
			<accessrule kind="accessible" pattern="sun/misc/**"/>
			<accessrule kind="accessible" pattern="com/sun/net/**"/>
		</accessrules>
	</classpathentry>
	<classpathentry kind="con" path="org.eclipse.buildship.core.gradleclasspathcontainer"/>
	<classpathentry kind="output" path="bin/default"/>
</classpath>

It looks to me that the .classpath is ok, but somehow I am still getting the same error. The option to clean the Java language server workspace does not seem to help either. Appreciate if you can shed some lights on this.

[fbricon]

Can you please attach a sample project?

[CLGitDev]

@fbricon I afraid I cannot attach the problematic project here directly as it is not open source. I will try creating a dummy project with those library dependencies and see if I can re-produce the problem there.
In the mean time, is there anything on top of your head that I should check for the problematic project? Thanks!

[CLGitDev]

@fbricon I realized that there are actually some exceptions in the Java language server log file, not sure if that matters:

!ENTRY org.eclipse.jdt.core 4 4 2019-12-12 14:33:29.598
!MESSAGE Exception while reading last build state for: P/jdt.ls-java-project
!STACK 1
org.eclipse.core.runtime.CoreException: Error reading last build state for project jdt.ls-java-project
	at org.eclipse.jdt.internal.core.JavaModelManager.readState(JavaModelManager.java:4161)
	at org.eclipse.jdt.internal.core.JavaModelManager.getLastBuiltState(JavaModelManager.java:2287)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.getLastState(JavaBuilder.java:456)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:189)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:833)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:371)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:392)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:154)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)
Caused by: java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:158)
	at org.eclipse.jdt.internal.core.builder.ClasspathJrt.loadModules(ClasspathJrt.java:127)
	at org.eclipse.jdt.internal.core.builder.ClasspathJrt.<init>(ClasspathJrt.java:68)
	at org.eclipse.jdt.internal.core.builder.ClasspathLocation.forJrtSystem(ClasspathLocation.java:146)
	at org.eclipse.jdt.internal.core.builder.State.read(State.java:290)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.readState(JavaBuilder.java:161)
	at org.eclipse.jdt.internal.core.JavaModelManager.readState(JavaModelManager.java:4153)
	... 15 more
!SUBENTRY 1 org.eclipse.jdt.core 4 2 2019-12-12 14:33:29.598
!MESSAGE Error reading last build state for project jdt.ls-java-project
!STACK 0
java.lang.NullPointerException
	at org.eclipse.jdt.internal.compiler.util.JRTUtil.walkModuleImage(JRTUtil.java:158)
	at org.eclipse.jdt.internal.core.builder.ClasspathJrt.loadModules(ClasspathJrt.java:127)
	at org.eclipse.jdt.internal.core.builder.ClasspathJrt.<init>(ClasspathJrt.java:68)
	at org.eclipse.jdt.internal.core.builder.ClasspathLocation.forJrtSystem(ClasspathLocation.java:146)
	at org.eclipse.jdt.internal.core.builder.State.read(State.java:290)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.readState(JavaBuilder.java:161)
	at org.eclipse.jdt.internal.core.JavaModelManager.readState(JavaModelManager.java:4153)
	at org.eclipse.jdt.internal.core.JavaModelManager.getLastBuiltState(JavaModelManager.java:2287)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.getLastState(JavaBuilder.java:456)
	at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:189)
	at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:833)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:220)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:263)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:316)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:45)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:319)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:371)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:392)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:154)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:244)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63)

[lfarkas]

is there any solution to this? or what is "the right way" to solve the original problem?

[snjeza]

@lfarkas you can try to call the 'Java: Clean the Java language server workspace' command.

[lfarkas]

@lfarkas you can try to call the 'Java: Clean the Java language server workspace' command.

thanks it's working!

[ai-chen2050]

There are two issues:

• one is tip says: Missing Gradle project configuration file: .settings/org.eclipse.buildship.core.prefs, cos I touch a file org.eclipse.buildship.core.prefs, and added the "org.eclipse.jdt.core.compiler.problem.forbiddenReference=ignore" to file. but it doesn't work at all.
• two issue is : Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar')
• env:
  - apple m1 pro
  - latest java pack
  - use Oracle JDK 1.8 to run the program, and use OpenJDK 17 to jdt, as the java server.
• Help! It's been bothering me all day. @fbricon @snjeza @lfarkas

[ai-chen2050]

some info as follow:

!ENTRY org.eclipse.jdt.ls.core 4 0 2022-06-24 00:40:59.039
!MESSAGE Error occured while building workspace. Details:
message: Access restriction: The method 'OperatingSystemMXBean.getProcessCpuLoad()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 70
message: Access restriction: The method 'OperatingSystemMXBean.getSystemCpuLoad()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 78
message: Access restriction: The method 'OperatingSystemMXBean.getTotalPhysicalMemorySize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 94
message: Access restriction: The method 'OperatingSystemMXBean.getFreePhysicalMemorySize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 102
message: Access restriction: The method 'OperatingSystemMXBean.getTotalSwapSpaceSize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 109
message: Access restriction: The method 'OperatingSystemMXBean.getFreeSwapSpaceSize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 116
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 5
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 44
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 47
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/common/src/main/java/org/tron/common/prometheus/OperatingSystemExports.java; line: 51
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 3
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 41
message: Access restriction: The type 'OperatingSystemMXBean' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 41
message: Access restriction: The method 'OperatingSystemMXBean.getTotalPhysicalMemorySize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 75
message: Access restriction: The method 'OperatingSystemMXBean.getFreePhysicalMemorySize()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 76
message: Access restriction: The method 'OperatingSystemMXBean.getSystemCpuLoad()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 77
message: Access restriction: The method 'OperatingSystemMXBean.getProcessCpuLoad()' is not API (restriction on required library '/Library/Java/JavaVirtualMachines/jdk1.8.0_202.jdk/Contents/Home/jre/lib/rt.jar'); code: 16777523; resource: /Users/blake.chen/work/code/opensource/java-tron/framework/src/main/java/org/tron/core/services/NodeInfoService.java; line: 84

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-06-24 00:41:01.712
!MESSAGE >> workspace/executeCommand vscode.java.resolveBuildFiles

[snjeza]

@ai-chen2050 could you try the following patch:

index 713e0a213..fab67d82c 100644
--- a/common/build.gradle
+++ b/common/build.gradle
@@ -1,6 +1,8 @@
+import org.gradle.plugins.ide.eclipse.model.AccessRule
 plugins {
     id 'java'
 }
+apply plugin: 'eclipse'
 
 version '1.0.0'
 
@@ -68,3 +70,15 @@ jacocoTestReport {
         }
     }
 }
+
+eclipse {
+    classpath {
+        file {
+            whenMerged {
+                def jre = entries.find { it.path.contains 'org.eclipse.jdt.launching.JRE_CONTAINER' }
+                jre.accessRules.add(new AccessRule('accessible', 'sun/misc/**'))
+                jre.accessRules.add(new AccessRule('accessible', 'com/sun/**'))
+            }
+        }
+    }
+}
diff --git a/framework/build.gradle b/framework/build.gradle
index e656c73b0..021f2fe28 100644
--- a/framework/build.gradle
+++ b/framework/build.gradle
@@ -1,9 +1,11 @@
+import org.gradle.plugins.ide.eclipse.model.AccessRule
 plugins {
     id "org.sonarqube" version "2.6"
 }
 
 apply plugin: 'application'
 apply plugin: 'checkstyle'
+apply plugin: 'eclipse'
 
 mainClassName = 'org.tron.program.FullNode'
 
@@ -281,3 +283,15 @@ task copyToParent(type: Copy) {
 }
 
 build.finalizedBy(copyToParent)
+
+eclipse {
+    classpath {
+        file {
+            whenMerged {
+                def jre = entries.find { it.path.contains 'org.eclipse.jdt.launching.JRE_CONTAINER' }
+                jre.accessRules.add(new AccessRule('accessible', 'sun/misc/**'))
+                jre.accessRules.add(new AccessRule('accessible', 'com/sun/**'))
+            }
+        }
+    }
+}

[ai-chen2050]

@ai-chen2050 could you try the following patch:

index 713e0a213..fab67d82c 100644
--- a/common/build.gradle
+++ b/common/build.gradle
@@ -1,6 +1,8 @@
+import org.gradle.plugins.ide.eclipse.model.AccessRule
 plugins {
     id 'java'
 }
+apply plugin: 'eclipse'
 
 version '1.0.0'
 
@@ -68,3 +70,15 @@ jacocoTestReport {
         }
     }
 }
+
+eclipse {
+    classpath {
+        file {
+            whenMerged {
+                def jre = entries.find { it.path.contains 'org.eclipse.jdt.launching.JRE_CONTAINER' }
+                jre.accessRules.add(new AccessRule('accessible', 'sun/misc/**'))
+                jre.accessRules.add(new AccessRule('accessible', 'com/sun/**'))
+            }
+        }
+    }
+}
diff --git a/framework/build.gradle b/framework/build.gradle
index e656c73b0..021f2fe28 100644
--- a/framework/build.gradle
+++ b/framework/build.gradle
@@ -1,9 +1,11 @@
+import org.gradle.plugins.ide.eclipse.model.AccessRule
 plugins {
     id "org.sonarqube" version "2.6"
 }
 
 apply plugin: 'application'
 apply plugin: 'checkstyle'
+apply plugin: 'eclipse'
 
 mainClassName = 'org.tron.program.FullNode'
 
@@ -281,3 +283,15 @@ task copyToParent(type: Copy) {
 }
 
 build.finalizedBy(copyToParent)
+
+eclipse {
+    classpath {
+        file {
+            whenMerged {
+                def jre = entries.find { it.path.contains 'org.eclipse.jdt.launching.JRE_CONTAINER' }
+                jre.accessRules.add(new AccessRule('accessible', 'sun/misc/**'))
+                jre.accessRules.add(new AccessRule('accessible', 'com/sun/**'))
+            }
+        }
+    }
+}

is need compiled by myself? And install offline, right ?

[snjeza]

git clone git@github.com:tronprotocol/java-tron.git
cd java-tron
git checkout -t origin/master
git apply <patch>
code .

[jdneo]

Please check #219 (comment) for solution.