# ./gradlew buildEdge fails despite successful EdgeApp-\> Export in Eclipse **URL:** \ **Category:** Software-Development\ **Created:** [May 20, 2021, 9:06am UTC](https://community.openems.io/t/gradlew-buildedge-fails-despite-successful-edgeapp-export-in-eclipse/512 "2021-05-20T09:06:28Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Bernd](https://community.openems.io/letter_avatar_proxy/v4/letter/b/977dab/32.png) [@Bernd](https://community.openems.io/u/Bernd)\ **Post date:** [May 20, 2021, 9:06am UTC](https://community.openems.io/t/gradlew-buildedge-fails-despite-successful-edgeapp-export-in-eclipse/512/1 "2021-05-20T09:06:28Z")
Hi all, I started recently to work with OpenEMS. From within Eclipse I can run and export a functional edge app. I am now trying to get thegradle build to work form commandline with ./gradlew buildEdge executed directly in the working copy. It fails with: > Task :io.openems.wrapper:jar FAILED > warning: io.openems.wrapper.fastexcel: The JAR is empty: The instructions for the JAR named io.openems.wrapper.fastexcel did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.influxdb-java: The JAR is empty: The instructions for the JAR named io.openems.wrapper.influxdb-java did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment/require bundle cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: The JAR is empty: The instructions for the JAR named io.openems.wrapper.paho-mqttv5 did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.sdnotify: The JAR is empty: The instructions for the JAR named io.openems.wrapper.sdnotify did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.opczip: The JAR is empty: The instructions for the JAR named io.openems.wrapper.opczip did not cause any content to be included, this is likely wrong > error : io.openems.wrapper.fastexcel: Exception: java.util.ConcurrentModificationException > at java.base/java.util.TreeMap.callMappingFunctionWithCheck(TreeMap.java:742) > at java.base/java.util.TreeMap.computeIfAbsent(TreeMap.java:596) > at aQute.bnd.osgi.Jar.putResource(Jar.java:337) > at aQute.bnd.osgi.Jar.buildFromZip(Jar.java:266) > at aQute.bnd.osgi.Jar.(Jar.java:131) > at aQute.bnd.osgi.Jar.(Jar.java:198) > at aQute.bnd.build.ProjectBuilder.addClasspath(ProjectBuilder.java:136) > at aQute.bnd.build.ProjectBuilder.init(ProjectBuilder.java:112) > at aQute.bnd.osgi.Builder.build(Builder.java:95) > at aQute.bnd.osgi.Builder.builds(Builder.java:1421) > at aQute.bnd.build.ProjectBuilder.builds(ProjectBuilder.java:722) > at aQute.bnd.build.Project.buildLocal(Project.java:1877) > at aQute.bnd.build.Project.build(Project.java:1689) > at aQute.bnd.build.Project.build(Project.java:2398) > at aQute.bnd.build.Project$build$17.call(Unknown Source) > at [truncated] > ``` > at java.base/java.lang.Thread.run(Thread.java:831) > > ``` > > error : io.openems.wrapper.opczip: Unexpected ProjectBuilder init, error null > error : io.openems.wrapper.opczip: Can not find JAR file ‘opczip-1.2.0.jar’ > FAILURE: Build failed with an exception. > > - What went wrong: > Execution failed for task ‘:io.openems.wrapper:jar’. > io.openems.wrapper has errors, 21 errors were reported > > - Try: > Run with --stacktrace option to get the stack trace. Run with --info or --debug option to \>get more log output. Run with --scan to get full insights. > > - Get more help at [https://help.gradle.org](https://help.gradle.org) > > BUILD FAILED in 4s > 1 actionable task: 1 executed > \<-------------\> 0% WAITING > IDLE What could be the issue with that? Thanks for any insights! EDIT: I just discovered that the the project io.openems.wrapper is the only one that uses sub-bundles (checkbox “enable sub-bundles” in io.openems.wrapper/bnd.bnd, option -sub: \*.bnd in the bnd.bnd source). Do sub-bundles work with gradlew? Maybe this is the source of the error. Best, Bernd ---
**Author:** ![stefan.feilmeier](https://community.openems.io/user_avatar/community.openems.io/stefan.feilmeier/32/2585_2.png) [@stefan.feilmeier](https://community.openems.io/u/stefan.feilmeier)\ **Post date:** [May 20, 2021, 12:53pm UTC](https://community.openems.io/t/gradlew-buildedge-fails-despite-successful-edgeapp-export-in-eclipse/512/2 "2021-05-20T12:53:11Z")
Hi Bernd, you need to execute `./gradlew build` first. This is what we do in our continuous integration build on GitHub Actions: > ---
**Author:** ![Bernd](https://community.openems.io/letter_avatar_proxy/v4/letter/b/977dab/32.png) [@Bernd](https://community.openems.io/u/Bernd)\ **Post date:** [May 20, 2021, 1:03pm UTC](https://community.openems.io/t/gradlew-buildedge-fails-despite-successful-edgeapp-export-in-eclipse/512/3 "2021-05-20T13:03:00Z")
Hi Stefan, thanks for your support, much appreciated! I ran ./gradlew clean ./gradlew build the last invocation failed with > Task :io.openems.wrapper:jar FAILED > warning: io.openems.wrapper.fastexcel: The JAR is empty: The instructions for the JAR named io.openems.wrapper.fastexcel did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.influxdb-java: The JAR is empty: The instructions for the JAR named io.openems.wrapper.influxdb-java did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment/require bundle cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: The JAR is empty: The instructions for the JAR named io.openems.wrapper.paho-mqttv5 did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.sdnotify: The JAR is empty: The instructions for the JAR named io.openems.wrapper.sdnotify did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.opczip: The JAR is empty: The instructions for the JAR named io.openems.wrapper.opczip did not cause any content to be included, this is likely wrong > error : io.openems.wrapper.fastexcel: Exception: java.util.ConcurrentModificationException > at java.base/java.util.TreeMap.callMappingFunctionWithCheck(TreeMap.java:742) > at java.base/java.util.TreeMap.computeIfAbsent(TreeMap.java:596) > at aQute.bnd.osgi.Jar.putResource(Jar.java:337) > at aQute.bnd.osgi.Jar.buildFromZip(Jar.java:266) > at aQute.bnd.osgi.Jar.(Jar.java:131) > at aQute.bnd.osgi.Jar.(Jar.java:198) > at aQute.bnd.build.ProjectBuilder.addClasspath(ProjectBuilder.java:136) > at aQute.bnd.build.ProjectBuilder.init(ProjectBuilder.java:112) > at aQute.bnd.osgi.Builder.build(Builder.java:95) > at aQute.bnd.osgi.Builder.builds(Builder.java:1421) > at aQute.bnd.build.ProjectBuilder.builds(ProjectBuilder.java:722) > at aQute.bnd.build.Project.buildLocal(Project.java:1877) > at aQute.bnd.build.Project.build(Project.java:1689) > at aQute.bnd.build.Project.build(Project.java:2398) > at aQute.bnd.build.Project$build$17.call(Unknown Source) > at aQute.bnd.gradle.BndPlugin$\_apply\_closure1$\_closure12$\_closure59.doCall(BndPlugin.groovy:275) > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78) > at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) > at java.base/java.lang.reflect.Method.invoke(Method.java:567) > at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:107) > at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:323) > at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:263) > at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1035) > at groovy.lang.Closure.call(Closure.java:412) > at groovy.lang.Closure.call(Closure.java:428) > at org.gradle.api.internal.AbstractTask$ClosureTaskAction.doExecute(AbstractTask.java:698) > at org.gradle.api.internal.AbstractTask$ClosureTaskAction.lambda$execute$0(AbstractTask.java:685) > at org.gradle.configuration.internal.DefaultUserCodeApplicationContext$CurrentApplication.reapply(DefaultUserCodeApplicationContext.java:86) > at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:685) > at org.gradle.api.internal.AbstractTask$ClosureTaskAction.execute(AbstractTask.java:660) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$2.run(ExecuteActionsTaskExecuter.java:498) > at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:29) > at org.gradle.internal.operations.DefaultBuildOperationRunner$1.execute(DefaultBuildOperationRunner.java:26) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.run(DefaultBuildOperationRunner.java:56) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$run$1(DefaultBuildOperationExecutor.java:71) > at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.runWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:45) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:71) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:483) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:466) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.access$300(ExecuteActionsTaskExecuter.java:105) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.executeWithPreviousOutputFiles(ExecuteActionsTaskExecuter.java:270) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution.execute(ExecuteActionsTaskExecuter.java:248) > at org.gradle.internal.execution.steps.ExecuteStep.executeInternal(ExecuteStep.java:83) > at org.gradle.internal.execution.steps.ExecuteStep.access$000(ExecuteStep.java:37) > at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:50) > at org.gradle.internal.execution.steps.ExecuteStep$1.call(ExecuteStep.java:47) > at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200) > at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76) > at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76) > at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:47) > at org.gradle.internal.execution.steps.ExecuteStep.execute(ExecuteStep.java:37) > at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:68) > at org.gradle.internal.execution.steps.RemovePreviousOutputsStep.execute(RemovePreviousOutputsStep.java:38) > at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:50) > at org.gradle.internal.execution.steps.ResolveInputChangesStep.execute(ResolveInputChangesStep.java:36) > at org.gradle.internal.execution.steps.CancelExecutionStep.execute(CancelExecutionStep.java:41) > at org.gradle.internal.execution.steps.TimeoutStep.executeWithoutTimeout(TimeoutStep.java:74) > at org.gradle.internal.execution.steps.TimeoutStep.execute(TimeoutStep.java:55) > at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:51) > at org.gradle.internal.execution.steps.CreateOutputsStep.execute(CreateOutputsStep.java:29) > at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:54) > at org.gradle.internal.execution.steps.CaptureStateAfterExecutionStep.execute(CaptureStateAfterExecutionStep.java:35) > at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:60) > at org.gradle.internal.execution.steps.BroadcastChangingOutputsStep.execute(BroadcastChangingOutputsStep.java:27) > at org.gradle.internal.execution.steps.BuildCacheStep.executeWithoutCache(BuildCacheStep.java:174) > at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:74) > at org.gradle.internal.execution.steps.BuildCacheStep.execute(BuildCacheStep.java:45) > at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:40) > at org.gradle.internal.execution.steps.StoreExecutionStateStep.execute(StoreExecutionStateStep.java:29) > at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:36) > at org.gradle.internal.execution.steps.RecordOutputsStep.execute(RecordOutputsStep.java:22) > at org.gradle.internal.execution.steps.SkipUpToDateStep.executeBecause(SkipUpToDateStep.java:99) > at org.gradle.internal.execution.steps.SkipUpToDateStep.lambda$execute$0(SkipUpToDateStep.java:92) > at java.base/java.util.Optional.map(Optional.java:260) > at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:52) > at org.gradle.internal.execution.steps.SkipUpToDateStep.execute(SkipUpToDateStep.java:36) > at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:84) > at org.gradle.internal.execution.steps.ResolveChangesStep.execute(ResolveChangesStep.java:41) > at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:37) > at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsFinishedStep.execute(MarkSnapshottingInputsFinishedStep.java:27) > at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:91) > at org.gradle.internal.execution.steps.ResolveCachingStateStep.execute(ResolveCachingStateStep.java:49) > at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:78) > at org.gradle.internal.execution.steps.CaptureStateBeforeExecutionStep.execute(CaptureStateBeforeExecutionStep.java:49) > at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:105) > at org.gradle.internal.execution.steps.ValidateStep.execute(ValidateStep.java:50) > at org.gradle.internal.execution.steps.SkipEmptyWorkStep.lambda$execute$2(SkipEmptyWorkStep.java:86) > at java.base/java.util.Optional.orElseGet(Optional.java:364) > at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:86) > at org.gradle.internal.execution.steps.SkipEmptyWorkStep.execute(SkipEmptyWorkStep.java:32) > at org.gradle.internal.execution.steps.legacy.MarkSnapshottingInputsStartedStep.execute(MarkSnapshottingInputsStartedStep.java:38) > at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:43) > at org.gradle.internal.execution.steps.LoadExecutionStateStep.execute(LoadExecutionStateStep.java:31) > at org.gradle.internal.execution.steps.AssignWorkspaceStep.lambda$execute$0(AssignWorkspaceStep.java:40) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$TaskExecution$2.withWorkspace(ExecuteActionsTaskExecuter.java:283) > at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:40) > at org.gradle.internal.execution.steps.AssignWorkspaceStep.execute(AssignWorkspaceStep.java:30) > at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:37) > at org.gradle.internal.execution.steps.IdentityCacheStep.execute(IdentityCacheStep.java:27) > at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:49) > at org.gradle.internal.execution.steps.IdentifyStep.execute(IdentifyStep.java:35) > at org.gradle.internal.execution.impl.DefaultExecutionEngine$1.execute(DefaultExecutionEngine.java:76) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeIfValid(ExecuteActionsTaskExecuter.java:184) > at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:173) > at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:109) > at org.gradle.api.internal.tasks.execution.FinalizePropertiesTaskExecuter.execute(FinalizePropertiesTaskExecuter.java:46) > at org.gradle.api.internal.tasks.execution.ResolveTaskExecutionModeExecuter.execute(ResolveTaskExecutionModeExecuter.java:51) > at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:57) > at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:56) > at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:36) > at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.executeTask(EventFiringTaskExecuter.java:77) > at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:55) > at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter$1.call(EventFiringTaskExecuter.java:52) > at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200) > at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75) > at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153) > at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68) > at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76) > at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54) > at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76) > at org.gradle.api.internal.tasks.execution.EventFiringTaskExecuter.execute(EventFiringTaskExecuter.java:52) > at org.gradle.execution.plan.LocalTaskNodeExecutor.execute(LocalTaskNodeExecutor.java:74) > at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:408) > at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$InvokeNodeExecutorsAction.execute(DefaultTaskExecutionGraph.java:395) > at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:388) > at org.gradle.execution.taskgraph.DefaultTaskExecutionGraph$BuildOperationAwareExecutionAction.execute(DefaultTaskExecutionGraph.java:374) > at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.lambda$run$0(DefaultPlanExecutor.java:127) > at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.execute(DefaultPlanExecutor.java:191) > at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.executeNextNode(DefaultPlanExecutor.java:182) > at org.gradle.execution.plan.DefaultPlanExecutor$ExecutorWorker.run(DefaultPlanExecutor.java:124) > at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64) > at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48) > at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1130) > at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:630) > at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56) > at java.base/java.lang.Thread.run(Thread.java:831) > \< > error : io.openems.wrapper.fastexcel: Unexpected ProjectBuilder init, error null > error : io.openems.wrapper.fastexcel: Can not find JAR file ‘fastexcel-0.12.9.jar’ > error : io.openems.wrapper.influxdb-java: Exception: java.util.ConcurrentModificationException > at java.base/java.util.TreeMap.callMappingFunctionWithCheck(TreeMap.java:742) > at java.base/java.util.TreeMap.computeIfAbsent(TreeMap.java:596) > at aQute.bnd.osgi.Jar.putResource(Jar.java:337) > at aQute.bnd.osgi.Jar.buildFromZip(Jar.java:266) etc. Apparently it didn’t help. somehow the jar files are not built or not found for all the bnd sub-bundles in io.openems.wrapper I there something else I can do to allow for better diagnosis? Provide any logs etc.? ---
**Author:** ![Bernd](https://community.openems.io/letter_avatar_proxy/v4/letter/b/977dab/32.png) [@Bernd](https://community.openems.io/u/Bernd)\ **Post date:** [May 20, 2021, 3:16pm UTC](https://community.openems.io/t/gradlew-buildedge-fails-despite-successful-edgeapp-export-in-eclipse/512/4 "2021-05-20T15:16:08Z")
After much try and error I tested with a fresh master checkout: git clone [GitHub - OpenEMS/openems: OpenEMS - Open Source Energy Management System](https://github.com/OpenEMS/openems.git) openems-master cd openems-master/ ./gradlew build with the same errors: > Downloading [https://services.gradle.org/distributions/gradle-7.0.2-bin.zip](https://services.gradle.org/distributions/gradle-7.0.2-bin.zip) > …10%…20%…30%…40%…50%…60%…70%…80%…90%…100% > > Welcome to Gradle 7.0.2! > > Here are the highlights of this release: > > - File system watching enabled by default > - Support for running with and building Java 16 projects > - Native support for Apple Silicon processors > - Dependency catalog feature preview > > For more details see [Link] > > Starting a Gradle Daemon (subsequent builds will be faster) > > Task :io.openems.wrapper:jar FAILED > warning: io.openems.wrapper.fastexcel: The JAR is empty: The instructions for the JAR named io.openems.wrapper.fastexcel did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.influxdb-java: The JAR is empty: The instructions for the JAR named io.openems.wrapper.influxdb-java did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment/require bundle cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: Host org.eclipse.paho.mqttv5.client= for this fragment cannot be found on the classpath > warning: io.openems.wrapper.paho-mqttv5: The JAR is empty: The instructions for the JAR named io.openems.wrapper.paho-mqttv5 did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.sdnotify: The JAR is empty: The instructions for the JAR named io.openems.wrapper.sdnotify did not cause any content to be included, this is likely wrong > warning: io.openems.wrapper.opczip: The JAR is empty: The instructions for the JAR named io.openems.wrapper.opczip did not cause any content to be included, this is likely wrong > error : io.openems.wrapper.fastexcel: Exception: java.util.ConcurrentModificationException etc.