Internal error while querying node's versions

[DevNils]

Gentics Mesh Version, operating system, or hardware.

• v1.7.0

Operating System

• MacOSX
• Docker

JVM

• Open JDK 1.8.0_100

Problem

On some (not all) of my nodes I get an error when I try to query the node's versions:

08:54:44.810 [] ERROR [vert.x-eventloop-thread-8] - Error for request in path: /api/v2/entdeckertour/nodes/1bcedad277a34298884ab11fcf8678ba/versions?lang=en
08:54:44.819 [] ERROR [vert.x-eventloop-thread-8] - Error:
java.lang.NullPointerException: null
	at com.gentics.mesh.core.data.container.impl.NodeGraphFieldContainerImpl.transformToVersionInfo(NodeGraphFieldContainerImpl.java:797)
	at com.gentics.mesh.core.data.node.impl.NodeImpl.lambda$transformToVersionList$11(NodeImpl.java:1003)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(Unknown Source)
	at java.base/java.util.Iterator.forEachRemaining(Unknown Source)
	at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Unknown Source)
	at java.base/java.util.stream.AbstractPipeline.copyInto(Unknown Source)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(Unknown Source)
	at java.base/java.util.stream.AbstractPipeline.evaluate(Unknown Source)
	at java.base/java.util.stream.ReferencePipeline.collect(Unknown Source)
	at com.gentics.mesh.core.data.node.impl.NodeImpl.lambda$transformToVersionList$12(NodeImpl.java:1004)
	at java.base/java.lang.Iterable.forEach(Unknown Source)
	at com.gentics.mesh.core.data.node.impl.NodeImpl.transformToVersionList(NodeImpl.java:1001)
	at com.gentics.mesh.core.endpoint.node.NodeCrudHandler.lambda$handleListVersions$43(NodeCrudHandler.java:502)
	at com.gentics.mesh.graphdb.OrientDBDatabase.tx(OrientDBDatabase.java:416)
	at com.gentics.mesh.core.verticle.handler.HandlerUtilities.syncTx(HandlerUtilities.java:233)
	at com.gentics.mesh.core.endpoint.node.NodeCrudHandler.handleListVersions(NodeCrudHandler.java:500)
	at com.gentics.mesh.core.endpoint.node.NodeEndpoint.lambda$addVersioningHandlers$1(NodeEndpoint.java:143)
	at io.vertx.ext.web.impl.BlockingHandlerDecorator.lambda$handle$0(BlockingHandlerDecorator.java:48)
	at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$2(ContextImpl.java:316)
	at io.vertx.core.impl.TaskQueue.run(TaskQueue.java:76)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at java.base/java.lang.Thread.run(Unknown Source)
08:54:44.834 [] ERROR [vert.x-eventloop-thread-8] - 172.18.0.4 - GET /api/v2/entdeckertour/nodes/1bcedad277a34298884ab11fcf8678ba/versions?lang=en HTTP/1.1 500 44 - 47 ms

Reproducer

/api/v2/entdeckertour/nodes/1bcedad277a34298884ab11fcf8678ba/versions?lang=en
I don't really know when this error occurred the first time and how to reproduce it. During development I fiddled around with users, deleted and added them. It might be possible that some users are not existing anymore, that where responsible for some versions.

Is it possible that the missing users are causing this error?

Expected behaviour and actual behaviour

Should deliver the version history of the node.

[Jotschi]

NPE in info.setCreator(getEditor().transformToReference());

TODO:

• Check whether user could be deleted
• Add NPE check for getEditor()==null

[Jotschi]

Thanks for reporting the issue. I made a fix for the error which will be included in the next release of Gentics Mesh.

[DevNils]

Thank You! You are welcome.

[Jotschi]

Fixed with version 1.7.1