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https://issues.apache.org/jira/browse/TINKERPOP-3221?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18045626#comment-18045626
]
Stephen Mallette commented on TINKERPOP-3221:
---------------------------------------------
i sense that this won't be the only problem with trying to connect older
drivers to 3.8.0 - there's simply too many breaking changes. I'm not sure why
this specific item was missed in the upgrade docs though except that we were
making a lot of changes to serialization at the time (particularly with 4.0.0)
and maybe I thought we'd come back to this item and it just slipped through the
cracks. sorry about that. if you intend to communicate with 3.8.0 servers, i
think you should switch to the 3.8.0 drivers. you should expect all future
3.8.x releases however to remain compatible.
> Strategy serialization breaking change in 3.8.0
> -----------------------------------------------
>
> Key: TINKERPOP-3221
> URL: https://issues.apache.org/jira/browse/TINKERPOP-3221
> Project: TinkerPop
> Issue Type: Bug
> Affects Versions: 3.8.0
> Reporter: Petr Langr
> Priority: Major
>
> Trying to connect to 3.8.0 tinkerpop server from older java client version
> fails when using traversal strategies.
>
> {code:java}
> NPE in java.util.Map.entrySet()" because "mapConf{code}
>
> Example query using java-client 3.7.4
>
> {code:java}
> g
> .with("Authorization", "Bearer xyz")
> .withStrategies(
> PartitionStrategy.build()
> .partitionKey("orgId")
> .readPartitions(orgId)
> .create()
> )
> .V()
> .count()
> .next() {code}
>
>
> Seems like TINKERPOP-3055 introduced unnecessary breaking change in
> deserialization. I could not find anything related to that in [release
> notes|https://github.com/apache/tinkerpop/blob/master/docs/src/upgrade/release-3.8.0.asciidoc].
>
> Below is an exception generated.
>
> {code:java}
> Could not deserialize the JSON value as required. Nested exception:
> org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException:
> Could not deserialize the JSON value as required. Nested exception:
> org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException:
> Could not deserialize the JSON value as required. Nested exception:
> java.lang.NullPointerException: Cannot invoke
> "java.util.Map.entrySet()" because "mapConf" is null
> at [Source:
> (byte[])"{"requestId":"85c62759-77ae-4abe-baf9-e734f38c68b8","op":"bytecode","processor":"traversal","args":{"@type":"g:Map","@value":["gremlin",{"@type":"g:Bytecode","@value":{"source":[["withStrategies",{"@type":"g:OptionsStrategy","@value":{"Authorization":"bearer
> xyz"[truncated 720 bytes]; line: 1, column: 1013]
> at [Source:
> (byte[])"{"requestId":"85c62759-77ae-4abe-baf9-e734f38c68b8","op":"bytecode","processor":"traversal","args":{"@type":"g:Map","@value":["gremlin",{"@type":"g:Bytecode","@value":{"source":[["withStrategies",{"@type":"g:OptionsStrategy","@value":{"Authorization":"bearer
> xyz"[truncated 720 bytes]; line: 1, column: 1013]
> at [Source:
> (byte[])"{"requestId":"85c62759-77ae-4abe-baf9-e734f38c68b8","op":"bytecode","processor":"traversal","args":{"@type":"g:Map","@value":["gremlin",{"@type":"g:Bytecode","@value":{"source":[["withStrategies",{"@type":"g:OptionsStrategy","@value":{"Authorization":"bearer
> xyz"[truncated 720 bytes]; line: 1, column: 1013]
> (through reference chain: java.util.LinkedHashMap["args"])
> at
> org.apache.tinkerpop.shaded.jackson.databind.JsonMappingException.from(JsonMappingException.java:269)
> at
> org.apache.tinkerpop.shaded.jackson.databind.DeserializationContext.mappingException(DeserializationContext.java:2167)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserialize(GraphSONTypeDeserializer.java:199)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserializeTypedFromAny(GraphSONTypeDeserializer.java:103)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.UntypedObjectDeserializer.deserializeWithType(UntypedObjectDeserializer.java:313)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.MapDeserializer._readAndBindStringKeyMap(MapDeserializer.java:625)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:449)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.MapDeserializer.deserialize(MapDeserializer.java:32)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserialize(GraphSONTypeDeserializer.java:217)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserializeTypedFromObject(GraphSONTypeDeserializer.java:88)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.MapDeserializer.deserializeWithType(MapDeserializer.java:492)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.impl.TypeWrappedDeserializer.deserialize(TypeWrappedDeserializer.java:74)
> at
> org.apache.tinkerpop.shaded.jackson.databind.DeserializationContext.readValue(DeserializationContext.java:977)
> at
> org.apache.tinkerpop.shaded.jackson.databind.DeserializationContext.readValue(DeserializationContext.java:964)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.AbstractObjectDeserializer.deserialize(AbstractObjectDeserializer.java:48)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserialize(GraphSONTypeDeserializer.java:217)
> at
> org.apache.tinkerpop.gremlin.structure.io.graphson.GraphSONTypeDeserializer.deserializeTypedFromAny(GraphSONTypeDeserializer.java:103)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.std.StdDeserializer.deserializeWithType(StdDeserializer.java:172)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.impl.TypeWrappedDeserializer.deserialize(TypeWrappedDeserializer.java:74)
> at
> org.apache.tinkerpop.shaded.jackson.databind.deser.DefaultDeserializationContext.readRootValue(DefaultDeserializationContext.java:323)
> at
> org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:4825)
> at
> org.apache.tinkerpop.shaded.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:3833)
> at
> org.apache.tinkerpop.gremlin.util.ser.AbstractGraphSONMessageSerializerV2.deserializeRequest(AbstractGraphSONMessageSerializerV2.java:122)
> at
> org.apache.tinkerpop.gremlin.server.handler.WsGremlinBinaryRequestDecoder.decode(WsGremlinBinaryRequestDecoder.java:77)
> at
> org.apache.tinkerpop.gremlin.server.handler.WsGremlinBinaryRequestDecoder.decode(WsGremlinBinaryRequestDecoder.java:43)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:91)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:93)
> at
> io.netty.handler.codec.http.websocketx.Utf8FrameValidator.channelRead(Utf8FrameValidator.java:98)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:107)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> org.apache.tinkerpop.gremlin.server.handler.WsAndHttpChannelizerHandler.channelRead(WsAndHttpChannelizerHandler.java:103)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346)
> at
> io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:356)
> at
> io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:293)
> at
> io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:354)
> at
> io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1429)
> at
> io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:918)
> at
> io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:168)
> at
> io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.handle(AbstractNioChannel.java:445)
> at
> io.netty.channel.nio.NioIoHandler$DefaultNioRegistration.handle(NioIoHandler.java:388)
> at
> io.netty.channel.nio.NioIoHandler.processSelectedKey(NioIoHandler.java:596)
> at
> io.netty.channel.nio.NioIoHandler.processSelectedKeysOptimized(NioIoHandler.java:571)
> at
> io.netty.channel.nio.NioIoHandler.processSelectedKeys(NioIoHandler.java:512)
> at io.netty.channel.nio.NioIoHandler.run(NioIoHandler.java:484)
> at
> io.netty.channel.SingleThreadIoEventLoop.runIo(SingleThreadIoEventLoop.java:225)
> at
> io.netty.channel.SingleThreadIoEventLoop.run(SingleThreadIoEventLoop.java:196)
> at
> io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:1193)
> at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
> at java.base/java.lang.Thread.run(Thread.java:1583) {code}
>
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