Prasanth Jayachandran created HIVE-16611:
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Summary: Kryo remove field is not working
Key: HIVE-16611
URL: https://issues.apache.org/jira/browse/HIVE-16611
Project: Hive
Issue Type: Bug
Components: Serializers/Deserializers
Affects Versions: 3.0.0
Reporter: Prasanth Jayachandran
I have seen some instances where removeField in SerializationUtilities is not
working
{code}
removeField(kryo, Operator.class, "colExprMap");
removeField(kryo, AbstractOperatorDesc.class, "statistics");
{code}
These 2 fields are not expected to be serialized but some stacktraces where
custom UDFs are involved these fields are observed in the stacktrace.
{code}
genericUDF (org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc)
chidren (org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc)
colExprMap (org.apache.hadoop.hive.ql.exec.SelectOperator)
childOperators (org.apache.hadoop.hive.ql.exec.TableScanOperator)
aliasToWork (org.apache.hadoop.hive.ql.plan.MapWork)
at
org.apache.hive.com.esotericsoftware.kryo.serializers.ObjectField.read(ObjectField.java:125)
...(snip)...
at org.apache.hive.com.esotericsoftware.kryo.Kryo.readObject(Kryo.java:672)
at
org.apache.hadoop.hive.ql.exec.Utilities.deserializeObjectByKryo(Utilities.java:1173)
at
org.apache.hadoop.hive.ql.exec.Utilities.deserializePlan(Utilities.java:1062)
at
org.apache.hadoop.hive.ql.exec.Utilities.deserializePlan(Utilities.java:1076)
{code}
This needs further investigation.
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