singhpk234 commented on issue #5414:
URL: https://github.com/apache/iceberg/issues/5414#issuecomment-1208967246
@jessiedanwang I am not sure how kryo serializer comes to play here, are
your spark confs overriden somewhere else ?
Ideally if you don't specify any serializer by default i think spark uses
java serializer.
Note : I tried it with both with specifying
`spark.serializer=org.apache.spark.serializer.JavaSerializer` and without
specifying any serializer and can confirm it worked for me .. here is a sample
spark submit (mostly taken from your spark submit example posted above)
``` shell
spark-shell --packages
org.apache.iceberg:iceberg-spark-runtime-3.1_2.12:0.14.0,software.amazon.awssdk:bundle:2.17.243,software.amazon.awssdk:url-connection-client:2.17.243
--conf spark.serializer=org.apache.spark.serializer.JavaSerializer \
--conf spark.driver.memory=4g --conf spark.executor.cores=4 --conf
spark.dynamicAllocation.enabled=true --conf
spark.sql.catalog.my_catalog=org.apache.iceberg.spark.SparkCatalog --conf
spark.sql.catalog.my_catalog.warehouse=s3://<bucket>/<prefix> \
--conf
spark.sql.catalog.my_catalog.catalog-impl=org.apache.iceberg.aws.glue.GlueCatalog
--conf spark.sql.catalog.my_catalog.io-impl=org.apache.iceberg.aws.s3.S3FileIO
\
--conf
spark.sql.catalog.my_catalog.lock-impl=org.apache.iceberg.aws.glue.DynamoLockManager
--conf spark.sql.catalog.my_catalog.lock.table=myGlueLockTable
```
----
Regarding kryo serializer class for name :
>
kryo.register(Class.forName("org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap"),
serializer)
you should this class instead :
``` java
kryo.register(
Class.forName("org.apache.iceberg.relocated.com.google.common.collect.SingletonImmutableBiMap"),
serializer);
```
as this is the actual class being used... for just POC purpose in the
custom serializer i wrote in comment above i just did `
kryo.register(obj.getClass(), serializer);`
Here is a complete git diff of my changes with custom serializer using
`class.forName` :
https://gist.github.com/singhpk234/5e570b04a8f8145846e1019a820eaef7
I hope it helps !
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