java.io.NotSerializableException on play.api.libs.json.ImmutableLinkedHashMap

[ramazanyich]

We have a redis cache implementation on our scala project to perform caching of some objects.
It has an api similar to PlayCache api and it worked with play-json 2.9.4.
Internally we use the java serialization (via ObjectInputStream/ObjetOutputStream) during call to redis set/get operations.
We are migrating to latest Play 2.9.0 version and the play-json 2.10.2 . And after migration during serialization we got following exception if serialized object contains JsObject as it's member (or child member contains JsObject...)
Can you mark play.api.libs.json.ImmutableLinkedHashMap as serializable ?

Caused by: java.io.NotSerializableException: play.api.libs.json.ImmutableLinkedHashMap
at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1187)
at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1572)
at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1438)
at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)
at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1572)
at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1438)
at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)
at java.base/java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1572)
at java.base/java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1529)
at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1438)
at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1181)
at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:350)
at io.waylay.redis.RedisCache$.anySerialize(RedisCache.scala:43)
at io.waylay.redis.RedisCache$.io$waylay$redis$RedisCache$$$anonfun$vSerializer$1(RedisCache.scala:26)
at io.waylay.redis.RedisCache$$anonfun$2.serialize(RedisCache.scala:26)
at redis.api.strings.Set.<init>(Strings.scala:125)
at redis.commands.Strings.set(Strings.scala:81)
at redis.commands.Strings.set$(Strings.scala:76)
at redis.RedisClient.set(Redis.scala:78)
at io.waylay.redis.RedisCache.set(RedisCache.scala:64)

[mkurz]

Can you please provide a pull request?

[ramazanyich]

@mkurz can you take a look on created PR ?

[mkurz]

Yes I will.

[mkurz]

Released 2.10.3 and 3.0.1 (later one will be on Maven central in like 30 minutes).

[ramazanyich]

thanks a lot ! our project build is now working with 2.10.3 version of play-json

[mkurz]

thanks a lot ! our project build is now working with 2.10.3 version of play-json

Perfect!