XWiki：XARをインポート中のStackOverflowError

Question

xwikiをバージョン8.2.1にアップデートしました。その後、私はXARをアップロードしようとするたびにStackOverflowErrorを取得します。誰がこれがどこから来るか考えている人はいますか？

14:39:05.955 [https://localhost/ xwiki /bin/get/XWiki/XWikiPreferences?xpage=packagedescriptor&package=org.xwiki.platform_xwiki-platform-administration-ui-8.2.1.xar] ERROR org.xwiki.velocity.tools.JSONTool - Failed to serialize object to JSON 
com.fasterxml.jackson.databind.JsonMappingException: Infinite recursion (StackOverflowError) (through reference chain: java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->java.util.UnmodifiableList[0]->org.xwiki.model.reference.EntityReference["reversedReferenceChain"]->[…]) 
at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:677) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:132) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:94) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:132) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:94) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:132) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:94) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:575) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:663) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:156) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:132) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:94) ~[jackson-databind-2.5.0.jar:2.5.0] 
    at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:24) ~[jackson-databind-2.5.0.jar:2.5.0] 
[…] 

14:39:05.968 [https://localhost/xwiki/bin/get/XWiki/XWikiPreferences?xpage=packagedescriptor&package=org.xwiki.platform_xwiki-platform-administration-ui-8.2.1.xar] DEBUG o.x.v.internal.DefaultVelocityEngine - Null reference [template '76:/templates/packagedescriptor.vm', line 36, column 4] : $jsontool.serialize($json) cannot be resolved. 

Answer 1

このエラーは、XWiki WARで提供されることになっているものより古いジャクソンのバージョンを持っていることを示唆しているようです。 EntityReference＃getReversedReferenceChain（）の直列化をスキップするために使用される@Transientをサポートしていないもの。

アプリケーションサーバーが古いバージョンのJacksonを持っていて、XWikiを適切に分離する必要があるかもしれません。