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

Solutions on the web

via GitHub by mcbleazz
, 1 year ago
This exception has no message.
via GitHub by dimon7147
, 1 year ago
This exception has no message.
via https://bugzilla.redhat.com/bugzilla/ by Ori Gofen, 1 year ago
via https://bugzilla.redhat.com/bugzilla/ by Gadi Ickowicz, 1 year ago
via https://bugzilla.redhat.com/bugzilla/ by Elad, 1 year ago
via GitHub by Sponges
, 1 year ago
java.lang.NullPointerException: 	at org.yaml.snakeyaml.emitter.Emitter.expectNode(Emitter.java:400)	at org.yaml.snakeyaml.emitter.Emitter.access$1600(Emitter.java:62)	at org.yaml.snakeyaml.emitter.Emitter$ExpectBlockMappingSimpleValue.expect(Emitter.java:641)	at org.yaml.snakeyaml.emitter.Emitter.emit(Emitter.java:216)	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:181)	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:205)	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:206)	at org.yaml.snakeyaml.serializer.Serializer.serializeNode(Serializer.java:206)	at org.yaml.snakeyaml.serializer.Serializer.serialize(Serializer.java:112)	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:243)	at org.yaml.snakeyaml.Yaml.dumpAll(Yaml.java:206)	at org.yaml.snakeyaml.Yaml.dump(Yaml.java:181)	at org.bukkit.configuration.file.YamlConfiguration.saveToString(YamlConfiguration.java:39)	at org.bukkit.configuration.file.FileConfiguration.save(FileConfiguration.java:68)	at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:497)	at skinsrestorer.shared.utils.ReflectionUtil.invokeMethod(ReflectionUtil.java:96)	at skinsrestorer.shared.utils.YamlConfig.save(YamlConfig.java:119)	at skinsrestorer.shared.utils.YamlConfig.set(YamlConfig.java:47)	at skinsrestorer.shared.storage.SkinStorage.removePlayerSkin(SkinStorage.java:47)	at skinsrestorer.shared.storage.SkinStorage.getPlayerSkin(SkinStorage.java:185)	at skinsrestorer.shared.storage.SkinStorage.getOrCreateSkinForPlayer(SkinStorage.java:207)	at skinsrestorer.bukkit.listeners.SkinsPacketHandler.write(SkinsPacketHandler.java:75)	at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658)	at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716)	at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706)	at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:741)	at io.netty.channel.DefaultChannelPipeline.writeAndFlush(DefaultChannelPipeline.java:895)	at io.netty.channel.AbstractChannel.writeAndFlush(AbstractChannel.java:240)	at com.comphenix.protocol.injector.netty.ChannelProxy.writeAndFlush(ChannelProxy.java:327)	at net.minecraft.server.v1_10_R1.NetworkManager$4.run(NetworkManager.java:200)	at com.comphenix.protocol.injector.netty.ChannelInjector$5$3.run(ChannelInjector.java:340)	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:380)	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:268)	at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)	at java.lang.Thread.run(Thread.java:745)