Julien Nioche created STORM-3582:
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Summary: Kryo errors when using custom serialization
Key: STORM-3582
URL: https://issues.apache.org/jira/browse/STORM-3582
Project: Apache Storm
Issue Type: Bug
Components: storm-core
Affects Versions: 2.1.0
Reporter: Julien Nioche
(this has been reported on the user list in January and previously by a
different user)
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My code works fine with Storm 1.x but the workers crash constantly with Storm
2.x
Some exceptions look like
{{_com.esotericsoftware.kryo.KryoException: Buffer underflow._}}
{{_at com.esotericsoftware.kryo.io.Input.require(Input.java:199)
~[kryo-3.0.3.jar:?]_}}
{{_at com.esotericsoftware.kryo.io.Input.readUtf8_slow(Input.java:575)
~[kryo-3.0.3.jar:?]_}}
{{_at com.esotericsoftware.kryo.io.Input.readUtf8(Input.java:553)
~[kryo-3.0.3.jar:?]_}}
{{_at com.esotericsoftware.kryo.io.Input.readString(Input.java:483)
~[kryo-3.0.3.jar:?]_}}
{{whereas others are}}
{{_2020-01-21 11:13:39.368 o.a.s.m.n.StormServerHandler
Netty-server-localhost-6701-worker-1 [ERROR] server errors in handling the
request_}}
{{_com.esotericsoftware.kryo.KryoException: Encountered unregistered class ID:
*95*
at
com.esotericsoftware.kryo.util.DefaultClassResolver.readClass(DefaultClassResolver.java:137)
~[kryo-3.0.3.jar:?]
at com.esotericsoftware.kryo.Kryo.readClass(Kryo.java:670) ~[kryo-3.0.3.jar:?]
at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:781)
~[kryo-3.0.3.jar:?]
at
com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:153)
~[kryo-3.0.3.jar:?]
at
com.esotericsoftware.kryo.serializers.MapSerializer.read(MapSerializer.java:39)
~[kryo-3.0.3.jar:?]
at com.esotericsoftware.kryo.Kryo.readClassAndObject(Kryo.java:793)
~[kryo-3.0.3.jar:?]
at
com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:134)
~[kryo-3.0.3.jar:?]
at
com.esotericsoftware.kryo.serializers.CollectionSerializer.read(CollectionSerializer.java:40)
~[kryo-3.0.3.jar:?]
at com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:689) ~[kryo-3.0.3.jar:?]
at
org.apache.storm.serialization.KryoValuesDeserializer.deserializeFrom(KryoValuesDeserializer.java:31)
~[storm-client-2.1.0.jar:2.1.0]_}}
{{the class ID values are random integers. }}
{{}}
The tuples in my topologies contain mostly standard classes like String; the
only exception is the following class
[https://github.com/DigitalPebble/storm-crawler/blob/2.x/core/src/main/java/com/digitalpebble/stormcrawler/Metadata.java#L41]
for which we specify a custom serialization for Kryo.
My configurations contain
| topology.kryo.register:|- com.digitalpebble.stormcrawler.Metadata|
to register the custom class.
The user who had reported the problem first also used custom serialization.
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