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java.lang.NullPointerException: null at com.bolyuba.nexus.plugin.npm.hosted.RecreateMetadataWalkerProcessor.extractPackageJson(RecreateMetadataWalkerProcessor.java:183)[na:na] at com.bolyuba.nexus.plugin.npm.hosted.RecreateMetadataWalkerProcessor.onCollectionExit(RecreateMetadataWalkerProcessor.java:110)[na:na] at org.sonatype.nexus.proxy.walker.DefaultWalker.onCollectionExit(DefaultWalker.java:325)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.nexus.proxy.walker.DefaultWalker.walkRecursive(DefaultWalker.java:226)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.nexus.proxy.walker.DefaultWalker.walkRecursive(DefaultWalker.java:209)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.nexus.proxy.walker.DefaultWalker.walkRecursive(DefaultWalker.java:209)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.nexus.proxy.walker.DefaultWalker.walk(DefaultWalker.java:89)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at com.bolyuba.nexus.plugin.npm.hosted.DefaultNpmHostedRepository.recreateNpmMetadata(DefaultNpmHostedRepository.java:106)[nexus-npm-repository-plugin-2.11.2-SNAPSHOT/:na] at com.bolyuba.nexus.plugin.npm.task.NpmHostedMetadataRebuildTask.doExecute(NpmHostedMetadataRebuildTask.java:50)[nexus-npm-repository-plugin-2.11.2-SNAPSHOT/:na] at com.bolyuba.nexus.plugin.npm.task.NpmTaskSupport.doRun(NpmTaskSupport.java:55)[nexus-npm-repository-plugin-2.11.2-SNAPSHOT/:na] at com.bolyuba.nexus.plugin.npm.task.NpmTaskSupport.doRun(NpmTaskSupport.java:37)[nexus-npm-repository-plugin-2.11.2-SNAPSHOT/:na] at org.sonatype.nexus.scheduling.AbstractNexusTask.call(AbstractNexusTask.java:151)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.scheduling.DefaultScheduledTask.call(DefaultScheduledTask.java:418)[nexus-scheduler-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.sonatype.nexus.threads.MDCAwareCallable.call(MDCAwareCallable.java:44)[nexus-core-2.11.2-SNAPSHOT.jar:2.11.2-SNAPSHOT] at org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90)[shiro-core-1.2.3.jar:1.2.3] at org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83)[shiro-core-1.2.3.jar:1.2.3] at java.util.concurrent.FutureTask.run(FutureTask.java:266)[na:1.8.0_25] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)[na:1.8.0_25] at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)[na:1.8.0_25] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[na:1.8.0_25] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[na:1.8.0_25] at java.lang.Thread.run(Thread.java:745)[na:1.8.0_25]