我正试图用hadoop的hive创建一个外部表，但不知怎么的失败了。这些是我尝试运行查询时遇到的错误。

02:23:29.516 [HiveServer2-Background-Pool: Thread-39] ERROR hive.ql.exec.DDLTask - org.apache.hadoop.hive.ql.metadata.HiveException: Cannot validate serde: org.openx.data.jsonserde.JsonSerDe
        at org.apache.hadoop.hive.ql.exec.DDLTask.validateSerDe(DDLTask.java:3858)
        at org.apache.hadoop.hive.ql.plan.CreateTableDesc.toTable(CreateTableDesc.java:700)
        at org.apache.hadoop.hive.ql.exec.DDLTask.createTable(DDLTask.java:3960)
        at org.apache.hadoop.hive.ql.exec.DDLTask.execute(DDLTask.java:333)
        at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:197)
        at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:100)
        at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1858)
        at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1562)
        at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1313)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1084)
        at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1077)
        at org.apache.hive.service.cli.operation.SQLOperation.runQuery(SQLOperation.java:235)
        at org.apache.hive.service.cli.operation.SQLOperation.access$300(SQLOperation.java:90)
        at org.apache.hive.service.cli.operation.SQLOperation$2$1.run(SQLOperation.java:299)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1926)
        at org.apache.hive.service.cli.operation.SQLOperation$2.run(SQLOperation.java:312)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: Class org.openx.data.jsonserde.JsonSerDe not found
        at org.apache.hadoop.conf.Configuration.getClassByName(Configuration.java:2329)
        at org.apache.hadoop.hive.ql.exec.DDLTask.validateSerDe(DDLTask.java:3852)
        ... 22 more

我该怎么解决？