Java 无法创建已存在的符号表值：null

我刚刚用Sonar5.6（Java插件v.3.14）配置了Jenkins 2.10，每次运行Jenkins作业时，Sonar也会运行，构建成功。但在检查我的日志时，许多指标根本不存在：

    ERROR: Unable to create symbol table for : /var/lib/jenkins/workspace/EnaparkServer/core/src/main/java/br/com/enapark/core/ApplicationConfig.java
java.lang.IllegalArgumentException: value already present: null
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:115) ~[sonar-plugin-api-deps1846330885217473608jar:na]
    at com.google.common.collect.AbstractBiMap.putInBothMaps(AbstractBiMap.java:112) ~[sonar-plugin-api-deps1846330885217473608jar:na]
    at com.google.common.collect.AbstractBiMap.put(AbstractBiMap.java:96) ~[sonar-plugin-api-deps1846330885217473608jar:na]
    at com.google.common.collect.HashBiMap.put(HashBiMap.java:85) ~[sonar-plugin-api-deps1846330885217473608jar:na]
    at org.sonar.java.resolve.Symbols.<init>(Symbols.java:189) ~[java-frontend-3.14.jar:na]
    at org.sonar.java.resolve.SemanticModel.createFor(SemanticModel.java:56) ~[java-frontend-3.14.jar:na]
    at org.sonar.java.model.VisitorsBridge.visitFile(VisitorsBridge.java:112) ~[java-frontend-3.14.jar:na]
    at org.sonar.java.ast.JavaAstScanner.simpleScan(JavaAstScanner.java:84) [java-frontend-3.14.jar:na]
    at org.sonar.java.ast.JavaAstScanner.scan(JavaAstScanner.java:67) [java-frontend-3.14.jar:na]
    at org.sonar.java.JavaSquid.scanSources(JavaSquid.java:143) [java-frontend-3.14.jar:na]
    at org.sonar.java.JavaSquid.scan(JavaSquid.java:136) [java-frontend-3.14.jar:na]
    at org.sonar.plugins.java.JavaSquidSensor.analyse(JavaSquidSensor.java:95) [sonar-java-plugin-3.14.jar:na]
    at org.sonar.batch.phases.SensorsExecutor.executeSensor(SensorsExecutor.java:58) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.phases.SensorsExecutor.execute(SensorsExecutor.java:50) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.phases.AbstractPhaseExecutor.execute(AbstractPhaseExecutor.java:83) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.scan.ModuleScanContainer.doAfterStart(ModuleScanContainer.java:192) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.scan.ProjectScanContainer.scan(ProjectScanContainer.java:241) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.scan.ProjectScanContainer.scanRecursively(ProjectScanContainer.java:236) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.scan.ProjectScanContainer.doAfterStart(ProjectScanContainer.java:226) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.task.ScanTask.execute(ScanTask.java:47) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.task.TaskContainer.doAfterStart(TaskContainer.java:86) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.startComponents(ComponentContainer.java:142) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.core.platform.ComponentContainer.execute(ComponentContainer.java:127) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.bootstrap.GlobalContainer.executeTask(GlobalContainer.java:106) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonar.batch.bootstrapper.Batch.executeTask(Batch.java:119) [sonar-scanner-engine-shaded-5.6.jar:na]
    at org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute(BatchIsolatedLauncher.java:62) [sonar-scanner-api-batch6466690605100887981.jar:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(java.base@9-internal/Native Method) ~[na:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke(java.base@9-internal/NativeMethodAccessorImpl.java:62) ~[na:na]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(java.base@9-internal/DelegatingMethodAccessorImpl.java:43) ~[na:na]
    at java.lang.reflect.Method.invoke(java.base@9-internal/Method.java:531) ~[na:na]
    at org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke(IsolatedLauncherProxy.java:60) [sonar-scanner-cli-2.6.1.jar:na]
    at com.sun.proxy.$Proxy0.execute(Unknown Source) [na:na]
    at org.sonarsource.scanner.api.EmbeddedScanner.doExecute(EmbeddedScanner.java:240) [sonar-scanner-cli-2.6.1.jar:na]
    at org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis(EmbeddedScanner.java:151) [sonar-scanner-cli-2.6.1.jar:na]
    at org.sonarsource.scanner.cli.Main.runAnalysis(Main.java:110) [sonar-scanner-cli-2.6.1.jar:na]
    at org.sonarsource.scanner.cli.Main.execute(Main.java:72) [sonar-scanner-cli-2.6.1.jar:na]
    at org.sonarsource.scanner.cli.Main.main(Main.java:60) [sonar-scanner-cli-2.6.1.jar:na]

错误：无法为：/var/lib/jenkins/workspace/EnaparkServer/core/src/main/java/br/com/enapark/core/ApplicationConfig.java创建符号表
java.lang.IllegalArgumentException:值已存在：null
在com.google.common.base.premissions.checkArgument（premissions.java:115）~[sonar-plugin-api-deps1846330885217473608jar:na]
在com.google.common.collect.AbstractBiMap.putInBothMaps（AbstractBiMap.java:112）~[sonar-plugin-api-deps1846330885217473608jar:na]
在com.google.common.collect.AbstractBiMap.put（AbstractBiMap.java:96）~[sonar-plugin-api-deps1846330885217473608jar:na]
在com.google.common.collect.HashBiMap.put（HashBiMap.java:85）~[sonar-plugin-api-deps1846330885217473608jar:na]
在org.sonar.java.resolve.Symbols.（Symbols.java:189）~[java-frontend-3.14.jar:na]
在org.sonar.java.resolve.SemanticModel.createFor（SemanticModel.java:56）~[java-frontend-3.14.jar:na]
在org.sonar.java.model.VisitorsBridge.visitFile（VisitorsBridge.java:112）~[java-frontend-3.14.jar:na]
在org.sonar.java.ast.JavaAstScanner.simpleScan（JavaAstScanner.java:84）[java-frontend-3.14.jar:na]
在org.sonar.java.ast.JavaAstScanner.scan（JavaAstScanner.java:67）[java-frontend-3.14.jar:na]
在org.sonar.java.JavaSquid.scanSources（JavaSquid.java:143）[java-frontend-3.14.jar:na]
在org.sonar.java.JavaSquid.scan（JavaSquid.java:136）[java-frontend-3.14.jar:na]
在org.sonar.plugins.java.JavaSquidSensor.analysis（JavaSquidSensor.java:95）[sonar-java-plugin-3.14.jar:na]
位于org.sonar.batch.phases.SensorsExecutor.executeSensor（SensorsExecutor.java:58）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.phases.SensorsExecutor.execute（SensorsExecutor.java:50）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.phases.AbstractPhaseExecutor.execute（AbstractPhaseExecutor.java:83）[sonar-scanner-engine-shaded-5.6.jar:na]
在org.sonar.batch.scan.ModuleScanContainer.doAfterStart（ModuleScanContainer.java:192）[sonar-scanner-engine-shade-5.6.jar:na]
位于org.sonar.core.platform.ComponentContainer.startComponents（ComponentContainer.java:142）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.core.platform.ComponentContainer.execute（ComponentContainer.java:127）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.scan.ProjectScanContainer.scan（ProjectScanContainer.java:241）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.scan.ProjectScanContainer.scanRecursely（ProjectScanContainer.java:236）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.scan.ProjectScanContainer.doAfterStart（ProjectScanContainer.java:226）[sonar-scanner-engine-shade-5.6.jar:na]
位于org.sonar.core.platform.ComponentContainer.startComponents（ComponentContainer.java:142）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.core.platform.ComponentContainer.execute（ComponentContainer.java:127）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.task.scanstask.execute（scanstask.java:47）[sonar-scanner-engine-shade-5.6.jar:na]
位于org.sonar.batch.task.TaskContainer.doAfterStart（TaskContainer.java:86）[sonar-scanner-engine-shade-5.6.jar:na]
位于org.sonar.core.platform.ComponentContainer.startComponents（ComponentContainer.java:142）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.core.platform.ComponentContainer.execute（ComponentContainer.java:127）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.bootstrap.GlobalContainer.executeTask（GlobalContainer.java:106）[sonar-scanner-engine-shade-5.6.jar:na]
在org.sonar.batch.bootstrapper.batch.executeTask（batch.java:119）[sonar-scanner-engine-shaded-5.6.jar:na]
在org.sonarsource.scanner.api.internal.batch.BatchIsolatedLauncher.execute（BatchIsolatedLauncher.java:62）[sonar-scanner-api-batch646669065100887981.jar:na]
在sun.reflect.NativeMethodAccessorImpl.invoke0（java。base@9-内部/本地方法）~[na:na]
在sun.reflect.NativeMethodAccessorImpl.invoke（java。base@9-内部/NativeMethodAccessorImpl.java:62）~[na:na]
在sun.reflect.DelegatingMethodAccessorImpl.invoke（java。base@9-内部/DelegatingMethodAccessorImpl.java:43）~[na:na]
在java.lang.reflect.Method.invoke（java。base@9-内部/Method.java:531）~[na:na]
在org.sonarsource.scanner.api.internal.IsolatedLauncherProxy.invoke（IsolatedLauncherProxy.java:60）[sonar-scanner-cli-2.6.1.jar:na]
在com.sun.proxy.$Proxy0.execute（未知源）[na:na]
在org.sonarsource.scanner.api.EmbeddedScanner.doExecute（EmbeddedScanner.java:240）[sonar-scanner-cli-2.6.1.jar:na]
在org.sonarsource.scanner.api.EmbeddedScanner.runAnalysis（EmbeddedScanner.java:151）[sonar-scanner-cli-2.6.1.jar:na]
在org.sonarsource.scanner.cli.Main.runAnalysis（Main.java:110）[sonar-scanner-cli-2.6.1.jar:na]
在org.sonarsource.scanner.cli.Main.execute（Main.java:72）[sonar-scanner-cli-2.6.1.jar:na]
位于org.sonarsource.scanner.cli.Main.Main（Main.java:60）[sonar-scanner-cli-2.6.1.jar:na]

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我的每一堂课都会重复这个问题。

问题是什么？发布一些您怀疑处理不正确的配置？也许可以参考用于设置Jenkins+Sonar的文档？