Applying microschema diff fails

[npomaroli]

Gentics Mesh Version, operating system, or hardware.

• v0.28.2

Problem

Using the MeshRestClient, when applying the microschema diff returned from Mesh on the microschema fails with a 500 Internal Server Error.

Reproducer

In test case com.gentics.mesh.core.schema.MicroschemaDiffEndpointTest.testAddField() add line

call(() -> client().applyChangesToMicroschema(microschema.getUuid(), changes));

at the end.

Expected behaviour and actual behaviour

Expected: applying the changes should succeed (and microschema should be changed accordingly)
Actual: Applying the changes fails.
Logged exception is:

TEST ERROR [vert.x-eventloop-thread-0] [FailureHandler.java:127] - Error for request in path: /api/v1/microschemas/2f375d18ae254a72b75d18ae25ca72b1/changes
TEST ERROR [vert.x-eventloop-thread-0] [FailureHandler.java:129] - Error:
java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String;
	at com.gentics.mesh.core.data.schema.impl.AddFieldChangeImpl.getAllowProp(AddFieldChangeImpl.java:63) ~[classes/:na]
	at com.gentics.mesh.core.data.schema.impl.AddFieldChangeImpl.apply(AddFieldChangeImpl.java:108) ~[classes/:na]
	at com.gentics.mesh.core.data.schema.handler.FieldSchemaContainerMutator.apply(FieldSchemaContainerMutator.java:29) ~[classes/:na]
	at com.gentics.mesh.core.data.schema.impl.AbstractGraphFieldSchemaContainerVersion.applyChanges(AbstractGraphFieldSchemaContainerVersion.java:187) ~[classes/:na]
	at com.gentics.mesh.core.data.schema.impl.AbstractGraphFieldSchemaContainerVersion.applyChanges(AbstractGraphFieldSchemaContainerVersion.java:224) ~[classes/:na]
	at com.gentics.mesh.core.endpoint.microschema.MicroschemaCrudHandler.lambda$7(MicroschemaCrudHandler.java:151) ~[classes/:na]
	at com.syncleus.ferma.tx.TxFactory.lambda$tx$1(TxFactory.java:71) ~[ferma-2.4.0.jar:2.4.0]
	at com.gentics.mesh.graphdb.OrientDBDatabase.tx(OrientDBDatabase.java:931) ~[classes/:na]
	at com.syncleus.ferma.tx.TxFactory.tx(TxFactory.java:70) ~[ferma-2.4.0.jar:2.4.0]
	at com.gentics.mesh.core.endpoint.microschema.MicroschemaCrudHandler.lambda$5(MicroschemaCrudHandler.java:149) ~[classes/:na]
	at com.syncleus.ferma.tx.TxFactory.lambda$tx$1(TxFactory.java:71) ~[ferma-2.4.0.jar:2.4.0]
	at com.gentics.mesh.graphdb.OrientDBDatabase.tx(OrientDBDatabase.java:931) ~[classes/:na]
	at com.syncleus.ferma.tx.TxFactory.tx(TxFactory.java:70) ~[ferma-2.4.0.jar:2.4.0]
	at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$15(HandlerUtilities.java:279) ~[classes/:na]
	at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$17(HandlerUtilities.java:304) ~[classes/:na]
	at io.vertx.core.impl.ContextImpl.lambda$executeBlocking$1(ContextImpl.java:273) ~[vertx-core-3.5.4.jar:3.5.4]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_131]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_131]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]
TEST ERROR [vert.x-eventloop-thread-0] [RoutingContextImplBase.java:154] - Unexpected exception in route
java.lang.IllegalArgumentException: code: -1 (expected: 0+)
	at io.netty.handler.codec.http.HttpResponseStatus.<init>(HttpResponseStatus.java:581) ~[netty-codec-http-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.handler.codec.http.HttpResponseStatus.<init>(HttpResponseStatus.java:569) ~[netty-codec-http-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.handler.codec.http.HttpResponseStatus.valueOf(HttpResponseStatus.java:446) ~[netty-codec-http-4.1.19.Final.jar:4.1.19.Final]
	at io.vertx.core.http.impl.HttpServerResponseImpl.setStatusCode(HttpServerResponseImpl.java:112) ~[vertx-core-3.5.4.jar:3.5.4]
	at com.gentics.mesh.router.route.FailureHandler.handle(FailureHandler.java:147) ~[classes/:na]
	at com.gentics.mesh.router.route.FailureHandler.handle(FailureHandler.java:1) ~[classes/:na]
	at io.vertx.ext.web.impl.RouteImpl.handleFailure(RouteImpl.java:235) ~[vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextImplBase.iterateNext(RoutingContextImplBase.java:117) ~[vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextImpl.next(RoutingContextImpl.java:133) [vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextImpl.doFail(RoutingContextImpl.java:465) [vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextImpl.fail(RoutingContextImpl.java:166) [vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextWrapper.fail(RoutingContextWrapper.java:73) [vertx-web-3.5.4.jar:3.5.4]
	at io.vertx.ext.web.impl.RoutingContextWrapper.fail(RoutingContextWrapper.java:73) [vertx-web-3.5.4.jar:3.5.4]
	at com.gentics.mesh.context.impl.InternalRoutingActionContextImpl.fail(InternalRoutingActionContextImpl.java:131) [classes/:na]
	at com.gentics.mesh.core.verticle.handler.HandlerUtilities.lambda$18(HandlerUtilities.java:310) [classes/:na]
	at io.vertx.core.impl.FutureImpl.setHandler(FutureImpl.java:79) ~[vertx-core-3.5.4.jar:3.5.4]
	at io.vertx.core.impl.ContextImpl.lambda$null$0(ContextImpl.java:289) ~[vertx-core-3.5.4.jar:3.5.4]
	at io.vertx.core.impl.ContextImpl.lambda$wrapTask$2(ContextImpl.java:339) ~[vertx-core-3.5.4.jar:3.5.4]
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:404) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:463) ~[netty-transport-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:886) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]
	at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.19.Final.jar:4.1.19.Final]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_131]