java.util.ConcurrentModificationException: This exception has no message.

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

Do you know how to solve this issue? Write a tip to help other users and build your expert profile.

Solutions on the web

java.util.ConcurrentModificationException:
at java.util.HashMap$EntrySpliterator.tryAdvance(Unknown Source)
at java.util.stream.ReferencePipeline.forEachWithCancel(Unknown Source)
at java.util.stream.AbstractPipeline.copyIntoWithCancel(Unknown Source)
at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source)
at java.util.stream.MatchOps$MatchOp.evaluateSequential(Unknown Source)
at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at io.github.nucleuspowered.nucleus.config.loaders.UserConfigLoader.clearNullSoftReferences(UserConfigLoader.java:127)
at io.github.nucleuspowered.nucleus.config.loaders.UserConfigLoader.getUser(UserConfigLoader.java:70)
at io.github.nucleuspowered.nucleus.config.loaders.UserConfigLoader.getUser(UserConfigLoader.java:58)
at io.github.nucleuspowered.nucleus.internal.migrators.EssCmdsMigrator.migrate(EssCmdsMigrator.java:106)
at io.github.nucleuspowered.nucleus.internal.command.MigratorCommand.executeCommand(MigratorCommand.java:67)
at io.github.nucleuspowered.nucleus.internal.command.AbstractCommand.startExecute(AbstractCommand.java:378)
at io.github.nucleuspowered.nucleus.internal.command.AbstractCommand.lambda$execute$45(AbstractCommand.java:364)
at org.spongepowered.api.scheduler.Task$Builder.lambda$execute$0(Task.java:138)
at org.spongepowered.common.scheduler.SchedulerBase.lambda$startTask$0(SchedulerBase.java:177)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

Users with the same issue

2 times, 3 months ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.