Hi all, We have a few Hive UDFs where I work. These are deployed by a bootstrap script so that the JAR files are in Hive's CLASSPATH before the server starts.
This works to load the UDF whenever a cluster is started and then the UDF can be loaded with the ADD JAR and CREATE TEMPORARY FUNCTION commands. However, if I copy out a UDF after Hive has been running, the new UDF does not get loaded. In order to load a new UDF, the only thing I have found that works is to restart the cluster. i.e., I have currently: MyLibrary-1.1.2-SNAPSHOT.jar which can be used with: ADD JAR /home/hadoop/lib/MyLibrary-1.1.2-SNAPSHOT.jar CREATE TEMPORARY FUNCTION my_function as 'com.namespace.ClassName' select my_function( args ) ... After I copy out a new jar with a new version I load it as: ADD JAR /home/hadoop/lib/MyLibrary-1.1.3-SNAPSHOT.jar CREATE TEMPORARY FUNCTION my_function as 'com.namespace.ClassName' Finally when calling the function select my_function( args ) ... It appears that there is no change in the function behavior. It still is using the old version 1.1.2, so I believe it is cached. Has anyone else seen this? and is there any standard way to deploy a UDF in order to ensure the new function is being used in Hive? Thanks, Dave
