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The "Hive/Locking" page has been changed by NamitJain. http://wiki.apache.org/hadoop/Hive/Locking?action=diff&rev1=10&rev2=11 -------------------------------------------------- list of objects may not be known - for eg. in case of dynamic partitions, the list of partitions being modified is not known at compile time - so, the list is generated conservatively. + Two new configurable parameters will be added to decide the number of retries for the lock and the + wait time between each retry. If the number of retries are really high, it can lead to a live lock. + Look at ZooKeeper (http://hadoop.apache.org/zookeeper/docs/r3.1.2/recipes.html#sc_recipes_Locks) to + see how read/write locks can be implemented using the zookeeper apis. Note that instead of waiting, + the lock request will be denied. The existing locks will be released, and all of them will be retried + after the retry interval. + + The default hive behavior will not be changed, and concurrency will not be supported. +
