Zhihua Deng created HIVE-26667: ---------------------------------- Summary: Incompatible expression deserialization against latest HMS Key: HIVE-26667 URL: https://issues.apache.org/jira/browse/HIVE-26667 Project: Hive Issue Type: Bug Components: Standalone Metastore Reporter: Zhihua Deng
When an old Hive Metastore client issues listPartitionsByExpr against the lastest HMS, an exception would be thrown: {noformat} MetaException(message:Unable to find class: ) at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_partitions_by_expr_result$get_partitions_by_expr_resultStandardScheme.read(ThriftHiveMetastore.java) at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_partitions_by_expr_result$get_partitions_by_expr_resultStandardScheme.read(ThriftHiveMetastore.java) at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$get_partitions_by_expr_result.read(ThriftHiveMetastore.java) at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:86) at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.recv_get_partitions_by_expr(ThriftHiveMetastore.java:3273) at org.apache.hadoop.hive.metastore.api.ThriftHiveMetastore$Client.get_partitions_by_expr(ThriftHiveMetastore.java:3260) at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.listPartitionsByExpr(HiveMetaStoreClient.java:1488){noformat} This was caused by a gap between old client and server on (de)serializing the expression. In old client, we don’t stream the expression’s class type into bytes, while the server should read the class type from serialized bytes firstly, which makes the trouble. Other APIs that need to (de)serialize expression may be suffered as well. -- This message was sent by Atlassian Jira (v8.20.10#820010)