过多的动态分区会导致job出现以下情况：

org.apache.hadoop.hive.ql.metadata.HiveException: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.server.namenode.LeaseExpiredException: No lease on /tmp/hive-maintain/hive_2012-11-28_22-39-43_810_1689858262130334284/_task_tmp.-ext-10002/part=33436268/_tmp.000004_0 File does not exist. Holder DFSClient_attempt_201211250925_9859_m_000004_0 does not have any open files.

解决方案：

加大动态分区数即可，下面是在当前session下设置。

SET hive.exec.max.dynamic.partitions=100000;

SET hive.exec.max.dynamic.partitions.pernode=100000;