Repeated out of memory error (Extension: Language Support for Java - Red Hat)

[jkpubsrc]

Extension: Language Support for Java (Red Hat)

OS: Ubuntu Linux

---

The extension tells me again that it runs out of memory. This is quite strange as I am developing a very small Java Module here and it already has increased the memory limit. It had been increased to 2G and now it has been increased to 4G by some kind of logic trying to compensate.

There seems to be a fundamental flaw in the Language Server, if 4 GByte of memory is required for something little as developing a small Java package.

Bug No. 1: The memory issue (see above).

Bug No. 2: To have to restart the whole VSCode IDE in order to compensate for this.

[snjeza]

@jkpubsrc Could you, please, attach a sample project and show your java.jdt.ls.vmargs property?

[jkpubsrc]

Update: My system has a total of 32 GByte memory and I terminated almost all processes, and the memory has been increased to 16 GB for the language server. Now I turned it back down to 4G as increasing it doesn't seem to help. My settings.json now is (again):

{
	"java.configuration.updateBuildConfiguration": "automatic",
	"java.dependency.packagePresentation": "hierarchical",
	"java.jdt.ls.vmargs": "-XX:+UseParallelGC -XX:GCTimeRatio=4 -XX:AdaptiveSizePolicyWeight=90 -Dsun.zip.disableMemoryMapping=true -Xmx4G -Xms100m"
}

Right now I can't attach a sample project as this is still under development. It will be released as open source in a week or two.

I've dealt with projects much larger than this in the last month, even on systems with half the memory. Strangely there was no problem with those projects.

Can't I enable some debugging switch and get some informative error message from the language server? As this system here has 32G of memory my rough guess is that the real cause of the error might be something completely different.

BTW:

Version: 1.63.0-insider
Commit: c1f2f40bcd81380bf2e286af64becddada57db88
Date: 2021-11-24T07:59:15.031Z
Electron: 13.5.2
Chromium: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Linux x64 5.4.0-90-generic

[jkpubsrc]

Don't know if it helps, but here is another detail: Sometimes (!) if I try to refactor-rename a variable or method, the edit field appears, I enter the new identifier, press enter and then I get a short error notice about some kind of internal error. No refactoring is done in this case. And a few moments later (indeterministic) I then get the out of memory error.

Update: Seems to be MUCH more stable if I avoid refactoring at all.

[snjeza]

@jkpubsrc could you, please, attach Java LS log - Enable logging

[jkpubsrc]

I'll try that. Please be patient.

[devforma]

Same problem

Version: 1.65.0 (Universal)
Commit: b5205cc8eb4fbaa726835538cd82372cc0222d43
Date: 2022-03-02T11:11:20.886Z (5 days ago)
Electron: 13.5.2
Chromium: 91.0.4472.164
Node.js: 14.16.0
V8: 9.1.269.39-electron.0
OS: Darwin arm64 21.3.0

settings.json

{
    "java.configuration.maven.userSettings": "/Users/mabingtao/maven/maven.xml",
    "java.configuration.updateBuildConfiguration": "automatic",
    "java.trace.server": "verbose"
}

log

!SESSION 2022-03-08 11:34:32.580 -----------------------------------------------
eclipse.buildId=unknown
java.version=17.0.2
java.vendor=Eclipse Adoptium
BootLoader constants: OS=macosx, ARCH=aarch64, WS=cocoa, NL=zh_CN_#Hans
Command-line arguments:  -data /Users/mabingtao/Library/Application Support/Code/User/workspaceStorage/e040ab4c86a48e38b89e79e6b1ccd103/redhat.java/jdt_ws

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:33.480
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is started

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:33.584
!MESSAGE Main thread is waiting

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:33.601
!MESSAGE >> initialize

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:33.602
!MESSAGE Initializing Java Language Server 1.9.0.202203030203

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.299
!MESSAGE Default VM Install changed from  null to 1646710474297-/Users/mabingtao/.vscode/extensions/redhat.java-1.4.0/jre/17.0.2-macosx-aarch64

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.308
!MESSAGE Setting java.home /Users/mabingtao/Library/Java/JavaVirtualMachines/zulu11.54.25-ca-jdk11.0.14.1/zulu-11.jdk/Contents/Home as default global VM

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.310
!MESSAGE Default VM Install changed from  1646710474297-/Users/mabingtao/.vscode/extensions/redhat.java-1.4.0/jre/17.0.2-macosx-aarch64 to 1646710474307-/Users/mabingtao/Library/Java/JavaVirtualMachines/zulu11.54.25-ca-jdk11.0.14.1/zulu-11.jdk/Contents/Home

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.321
!MESSAGE JVM Runtimes changed, saving new configuration

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.328
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.329
!MESSAGE Non-Static Commands: [java.edit.organizeImports, java.project.refreshDiagnostics, java.project.import, java.navigate.openTypeHierarchy, java.project.removeFromSourcePath, java.project.listSourcePaths, java.project.resolveStackTraceLocation, java.project.getAll, java.project.isTestFile, java.project.getClasspaths, java.navigate.resolveTypeHierarchy, java.edit.stringFormatting, java.project.getSettings, java.project.updateSourceAttachment, java.project.upgradeGradle, java.project.resolveSourceAttachment, java.project.addToSourcePath]

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.329
!MESSAGE Static Commands: []

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.329
!MESSAGE Non-Static Commands: [vscode.java.checkProjectSettings, vscode.java.isOnClasspath, vscode.java.fetchUsageData, vscode.java.validateLaunchConfig, vscode.java.resolveInlineVariables, vscode.java.resolveClassFilters, vscode.java.resolveMainMethod, vscode.java.resolveClasspath, vscode.java.resolveBuildFiles, vscode.java.resolveMainClass, vscode.java.updateDebugSettings, vscode.java.resolveSourceUri, vscode.java.fetchPlatformSettings, vscode.java.buildWorkspace, vscode.java.startDebugSession, vscode.java.inferLaunchCommandLength, vscode.java.resolveElementAtSelection, vscode.java.resolveJavaExecutable]

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.333
!MESSAGE Wait for AutoBuildOffJob start

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.347
!MESSAGE Wait for AutoBuildOffJob end 14ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.348
!MESSAGE Starting org.eclipse.m2e.core

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.348
!MESSAGE Started org.eclipse.m2e.core 1ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.348
!MESSAGE ProjectRegistryRefreshJob finished 0ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.348
!MESSAGE Starting org.eclipse.buildship.core

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.360
!MESSAGE Started org.eclipse.buildship.core 12ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.374
!MESSAGE LoadingGradleVersionJob finished 12ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.383
!MESSAGE Creating the Java project jdt.ls-java-project

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.387
!MESSAGE >> initialized

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.435
!MESSAGE Finished creating the Java project jdt.ls-java-project

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:34.775
!MESSAGE Importing Maven project(s)

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:36.886
!MESSAGE Workspace initialized in 2511ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:36.911
!MESSAGE >> initialization job finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:36.936
!MESSAGE >> workspace/didChangeConfiguration

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:36.940
!MESSAGE >> New configuration: {java={home=/Users/mabingtao/Library/Java/JavaVirtualMachines/zulu11.54.25-ca-jdk11.0.14.1/zulu-11.jdk/Contents/Home, jdt={ls={java={home=null}, vmargs=-javaagent:/Users/mabingtao/lombok.jar -javaagent:"/Users/mabingtao/.vscode/extensions/gabrielbb.vscode-lombok-1.0.1/server/lombok.jar"}}, errors={incompleteClasspath={severity=warning}}, configuration={checkProjectSettingsExclusions=false, updateBuildConfiguration=automatic, maven={userSettings=/Users/mabingtao/maven/maven.xml, globalSettings=null, notCoveredPluginExecutionSeverity=warning}, workspaceCacheLimit=90.0, runtimes=[]}, trace={server=verbose}, import={maven={enabled=true}, gradle={enabled=true, wrapper={enabled=true}, version=null, home=null, java={home=null}, offline={enabled=false}, arguments=null, jvmArguments=null, user={home=null}}, exclusions=[**/node_modules/**, **/.metadata/**, **/archetype-resources/**, **/META-INF/maven/**], generatesMetadataFilesAtProjectRoot=false}, maven={downloadSources=false, updateSnapshots=false}, eclipse={downloadSources=false}, referencesCodeLens={enabled=false}, signatureHelp={enabled=false}, implementationsCodeLens={enabled=false}, format={enabled=true, settings={url=null, profile=null}, comments={enabled=true}, onType={enabled=true}, insertSpaces=true, tabSize=4.0}, saveActions={organizeImports=false}, project={referencedLibraries=[lib/**/*.jar], importOnFirstTimeStartup=automatic, importHint=true, resourceFilters=[node_modules, .git]}, contentProvider={preferred=null}, autobuild={enabled=true}, maxConcurrentBuilds=1.0, recommendations={dependency={analytics={show=true}}}, completion={maxResults=0.0, enabled=true, overwrite=true, guessMethodArguments=false, favoriteStaticMembers=[org.junit.Assert.*, org.junit.Assume.*, org.junit.jupiter.api.Assertions.*, org.junit.jupiter.api.Assumptions.*, org.junit.jupiter.api.DynamicContainer.*, org.junit.jupiter.api.DynamicTest.*, org.mockito.Mockito.*, org.mockito.ArgumentMatchers.*, org.mockito.Answers.*], filteredTypes=[java.awt.*, com.sun.*, sun.*, jdk.*, org.graalvm.*, io.micrometer.shaded.*], importOrder=[java, javax, com, org]}, foldingRange={enabled=true}, progressReports={enabled=true}, codeGeneration={hashCodeEquals={useJava7Objects=false, useInstanceof=false}, useBlocks=false, generateComments=false, toString={template=${object.className} [${member.name()}=${member.value}, ${otherMembers}], codeStyle=STRING_CONCATENATION, skipNullValues=false, listArrayContents=true, limitElements=0.0}, insertionLocation=afterCursor}, selectionRange={enabled=true}, showBuildStatusOnStart={enabled=notification}, server={launchMode=Hybrid}, sources={organizeImports={starThreshold=99.0, staticStarThreshold=99.0}}, imports={gradle={wrapper={checksums=[]}}}, templates={fileHeader=[], typeComment=[]}, references={includeAccessors=true, includeDecompiledSources=true}, typeHierarchy={lazyLoad=false}, settings={url=null}, symbols={includeSourceMethodDeclarations=false}, quickfix={showAt=line}, debug={logLevel=warn, settings={showHex=false, showStaticVariables=false, showQualifiedNames=false, showLogicalStructure=true, showToString=true, maxStringLength=0.0, numericPrecision=0.0, hotCodeReplace=manual, enableRunDebugCodeLens=true, forceBuildBeforeLaunch=true, onBuildFailureProceed=false, console=integratedTerminal, exceptionBreakpoint={skipClasses=[]}, stepping={skipClasses=[], skipSynthetics=false, skipStaticInitializers=false, skipConstructors=false}, jdwp={limitOfVariablesPerJdwpRequest=100.0, requestTimeout=3000.0}, vmArgs=}}, silentNotification=false}}

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:36.942
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:37.308
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:37.594
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:37.714
!MESSAGE Reconciled 1. Took 0 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.189
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.189
!MESSAGE 4 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.220
!MESSAGE Validated 1. Took 135 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.244
!MESSAGE >> build jobs finished

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.247
!MESSAGE >> workspace/executeCommand java.project.getAll

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.250
!MESSAGE >> registerWatchers'

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.253
!MESSAGE >> registerFeature 'workspace/didChangeWatchedFiles'

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.254
!MESSAGE >> watchers registered

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.257
!MESSAGE >> workspace/executeCommand java.project.getSettings

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.456
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.486
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:38.506
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY java-debug 1 0 2022-03-08 11:34:38.509
!MESSAGE Starting com.microsoft.java.debug.plugin

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:39.972
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:39.977
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.477
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.605
!MESSAGE >> document/documentHighlight

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.778
!MESSAGE >> document/didChange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.783
!MESSAGE >> document/completion

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.789
!MESSAGE Reconciled 1. Took 5 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.856
!MESSAGE Completion request completed

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.877
!MESSAGE >> document/resolveCompletionItem

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:40.969
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.024
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.025
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.305
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.306
!MESSAGE 2 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.308
!MESSAGE Validated 1. Took 117 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.564
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.771
!MESSAGE >> document/willSaveWaitUntil

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.800
!MESSAGE >> document/didSave

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:41.979
!MESSAGE Reconciled 1. Took 1 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:42.121
!MESSAGE >> workspace/didChangeWatchedFiles 

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:42.425
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:42.426
!MESSAGE 2 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:42.427
!MESSAGE Validated 1. Took 47 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.026
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.075
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.187
!MESSAGE >> document/documentHighlight

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.328
!MESSAGE >> document/didChange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.339
!MESSAGE Reconciled 1. Took 4 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.344
!MESSAGE >> document/completion

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.350
!MESSAGE Completion request completed

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.359
!MESSAGE >> document/resolveCompletionItem

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.528
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.580
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.781
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.782
!MESSAGE 0 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:43.782
!MESSAGE Validated 1. Took 37 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.334
!MESSAGE >> document/willSaveWaitUntil

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.358
!MESSAGE >> document/didSave

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.508
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.547
!MESSAGE >> document/willSaveWaitUntil

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.572
!MESSAGE >> document/didSave

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.577
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.589
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.590
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.655
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.682
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.690
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.691
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:44.888
!MESSAGE >> workspace/didChangeWatchedFiles 

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.011
!MESSAGE Reconciled 1. Took 1 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.462
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.462
!MESSAGE 0 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.462
!MESSAGE Validated 1. Took 45 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.504
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.514
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.520
!MESSAGE Reconciled 1. Took 1 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.673
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.725
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.736
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.951
!MESSAGE begin problem for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.951
!MESSAGE 0 problems reported for /MasterService.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.969
!MESSAGE begin problem for /PluginMemoryStoreImpl.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.969
!MESSAGE 0 problems reported for /PluginMemoryStoreImpl.java

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:45.970
!MESSAGE Validated 2. Took 46 ms

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:46.366
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:46.542
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:46.623
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:52.266
!MESSAGE >> workspace/didChangeWatchedFiles 

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:53.154
!MESSAGE >> workspace/didChangeWatchedFiles 

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:55.810
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:55.863
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:55.872
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:34:55.872
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:35:07.674
!MESSAGE Parent process stopped running, forcing server exit

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:35:07.674
!MESSAGE Shutdown received... waking up main thread

!ENTRY java-debug 1 0 2022-03-08 11:35:07.686
!MESSAGE Stopping com.microsoft.java.debug.plugin

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:35:07.687
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is stopping:

!ENTRY org.eclipse.jdt.core 4 4 2022-03-08 11:35:08.214
!MESSAGE Failed to save JDT index: Index for /plugin-master-service
!STACK 0
java.io.IOException: Failed to read index data from file:/Users/mabingtao/Library/Application%20Support/Code/User/workspaceStorage/e040ab4c86a48e38b89e79e6b1ccd103/redhat.java/jdt_ws/.metadata/.plugins/org.eclipse.jdt.core/358424085.index at offset 327 and size 1937010546
	at org.eclipse.jdt.internal.core.index.DiskIndex.readCategoryTable(DiskIndex.java:685)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeCategory(DiskIndex.java:485)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeCategories(DiskIndex.java:477)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeWith(DiskIndex.java:579)
	at org.eclipse.jdt.internal.core.index.Index.save(Index.java:230)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveIndex(IndexManager.java:1143)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveIndexes(IndexManager.java:1201)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.notifyIdle(IndexManager.java:819)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:422)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.OutOfMemoryError: Java heap space
	at org.eclipse.jdt.internal.compiler.util.HashtableOfObject.<init>(HashtableOfObject.java:56)
	at org.eclipse.jdt.internal.core.index.DiskIndex.readCategoryTable(DiskIndex.java:681)
	... 9 more

!ENTRY org.eclipse.core.resources 2 10035 2022-03-08 11:35:08.833
!MESSAGE The workspace will exit with unsaved changes in this session.

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:22.969
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:34.917
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:35.913
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:35.983
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:35.999
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.000
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.110
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.148
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.155
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.156
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.266
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.277
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.556
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.577
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.578
!MESSAGE ClassFile contents request completed

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.586
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.586
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.696
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.709
!MESSAGE >> java/classFileContents

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.710
!MESSAGE ClassFile contents request completed

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.719
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:36.719
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:43.061
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:43.501
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:46.704
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:46.964
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:47.699
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:47.876
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:47.931
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:47.956
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:48.180
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:48.360
!MESSAGE >> document/foldingRange

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:48.413
!MESSAGE >> document/codeAction

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:36:48.436
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:56.734
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:56.735
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:56.778
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:57.125
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:57.278
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:57.300
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:38:58.734
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:42.195
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:42.583
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:57.514
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:57.580
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:57.617
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:58.006
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:58.028
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:39:58.031
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:00.817
!MESSAGE >> document/hover

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:00.853
!MESSAGE >> java/findLinks

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:00.873
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:01.150
!MESSAGE >> document/definition

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:01.181
!MESSAGE >> document/didOpen

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:40:01.183
!MESSAGE >> document/didClose

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:42:30.596
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:42:35.941
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:42:37.847
!MESSAGE >> workspace/executeCommand vscode.java.resolveMainMethod

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-08 11:42:38.352
!MESSAGE >> document/codeAction

[rgrunber]

https://bugs.eclipse.org/bugs/show_bug.cgi?id=578211 improved the logging of this, so at least we now know what file is causing it.

/Users/mabingtao/Library/Application%20Support/Code/User/workspaceStorage/e040ab4c86a48e38b89e79e6b1ccd103/redhat.java/jdt_ws/.metadata/.plugins/org.eclipse.jdt.core/358424085.index at offset 327 and size 1937010546

Offsets have changed a bit but I suspect it's failing at https://git.eclipse.org/c/jdt/eclipse.jdt.core.git/tree/org.eclipse.jdt.core/search/org/eclipse/jdt/internal/core/index/DiskIndex.java#n682 . One of the category tables of the index needs a massive amount of space to be read into memory.

1937010546 (requested size to new HashtableOfObject(size))
2147483645 (MAX_ARRAY_SIZE for JVM as set by JDT)

What is the size of 358424085.index ? What happens if clean the language server workspace and do a rebuild ? Does the problem continue the same every time ?

[devforma]

size of 358424085.index is 7973Bytes

[devforma]

oom again

filesize of 2995036876.index is 9165Byte

!ENTRY org.eclipse.jdt.ls.core 1 0 2022-03-10 20:58:06.523
!MESSAGE class org.eclipse.jdt.ls.core.internal.JavaLanguageServerPlugin is stopping:

!ENTRY org.eclipse.jdt.core 4 4 2022-03-10 20:58:06.808
!MESSAGE Failed to save JDT index: Index for /route-service
!STACK 0
java.io.IOException: Failed to read index data from file:/Users/mabingtao/Library/Application%20Support/Code/User/workspaceStorage/e462cfedb38c4a978e763b3ce4c9c764/redhat.java/jdt_ws/.metadata/.plugins/org.eclipse.jdt.core/2995036876.index at offset 1065 and size 1952805459
	at org.eclipse.jdt.internal.core.index.DiskIndex.readCategoryTable(DiskIndex.java:685)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeCategory(DiskIndex.java:485)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeCategories(DiskIndex.java:477)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeWith(DiskIndex.java:579)
	at org.eclipse.jdt.internal.core.index.Index.save(Index.java:230)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveIndex(IndexManager.java:1143)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveIndexes(IndexManager.java:1201)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.notifyIdle(IndexManager.java:819)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:422)
	at java.base/java.lang.Thread.run(Unknown Source)
Caused by: java.lang.OutOfMemoryError: Java heap space
	at org.eclipse.jdt.internal.compiler.util.HashtableOfObject.<init>(HashtableOfObject.java:56)
	at org.eclipse.jdt.internal.core.index.DiskIndex.readCategoryTable(DiskIndex.java:681)
	... 9 more

!ENTRY org.eclipse.jdt.core 4 0 2022-03-10 20:58:06.809
!MESSAGE Failed to update qualified index.
!STACK 0
java.io.IOException: Stream was closed for index location "file:/Users/mabingtao/Library/Application%20Support/Code/User/workspaceStorage/e462cfedb38c4a978e763b3ce4c9c764/redhat.java/jdt_ws/.metadata/.plugins/org.eclipse.jdt.core/1865797976.index"
	at org.eclipse.jdt.internal.core.index.DiskIndex.readChunk(DiskIndex.java:751)
	at org.eclipse.jdt.internal.core.index.DiskIndex.readAllDocumentNames(DiskIndex.java:640)
	at org.eclipse.jdt.internal.core.index.DiskIndex.mergeWith(DiskIndex.java:532)
	at org.eclipse.jdt.internal.core.index.Index.save(Index.java:230)
	at org.eclipse.jdt.internal.core.index.MetaIndex.save(MetaIndex.java:100)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveMetaIndex(IndexManager.java:1248)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.saveIndexes(IndexManager.java:1224)
	at org.eclipse.jdt.internal.core.search.indexing.IndexManager.notifyIdle(IndexManager.java:819)
	at org.eclipse.jdt.internal.core.search.processing.JobManager.run(JobManager.java:422)
	at java.base/java.lang.Thread.run(Unknown Source)

[devanpedrik]

I am currently using the extension and facing this issue as well, are there any updates regarding the out of memory issue?

[rgrunber]

I am currently using the extension and facing this issue as well, are there any updates regarding the out of memory issue?

Is vscode-java just notifying that it ran out of memory, and recommending to increase XmX ? Does the log file accessed from Java: Open Java Language Server Log File show any errors related to the index file, or how the process ran out of memory ?

Once we update to a version of JDT that uses eclipse-jdt/eclipse.jdt.core#460, it might be worth trying to see if the problem goes away for those whose index files might have gotten corrupted somehow.