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    Expert tip

    Kryo doesn't accept multi-threaded data access, there's a few workarounds for this, such as duplicating the buffer, but they sacrifice a bit of performance.

Solutions on the web

via Stack Overflow by Ok Letsdothis
, 1 year ago
Encountered unregistered class ID: 13994
via locationtech.org by Unknown author, 1 year ago
via Google Groups by Venu Kemthur, 1 year ago
via Google Groups by Daniel, 2 years ago
Encountered unregistered class ID: 12
via mail-archive.com by Unknown author, 1 year ago
via GitHub by pablo-rago
, 2 years ago
Encountered unregistered class ID: 81
com.esotericsoftware.kryo.KryoException: Encountered unregistered class ID: 13994	at com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:119)	at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:610)	at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:721)	at org.apache.spark.serializer.KryoSerializerInstance.deserialize(KryoSerializer.scala:311)	at org.apache.spark.scheduler.DirectTaskResult.value(TaskResult.scala:97)	at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply$mcV$sp(TaskResultGetter.scala:60)	at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:51)	at org.apache.spark.scheduler.TaskResultGetter$$anon$2$$anonfun$run$1.apply(TaskResultGetter.scala:51)	at org.apache.spark.util.Utils$.logUncaughtExceptions(Utils.scala:1765)	at org.apache.spark.scheduler.TaskResultGetter$$anon$2.run(TaskResultGetter.scala:50)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)