我试图在Hive 0.14中执行Hive ACID事务属性,例如通过Java进行插入,删除和更新。我能够设置所需的ACID事务属性。还能够使用事务属性创建表。但这是失败的。下面是示例代码:
public class HiveJdbcClient {
private static String driverName = "org.apache.hive.jdbc.HiveDriver";
public static void main(String[] args) throws SQLException {
try {
Class.forName(driverName);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
System.exit(1);
}
Connection con = DriverManager.getConnection("jdbc:hive2://ipaddress:port/default", "user", "password");
Statement stmt = con.createStatement();
stmt.execute("set set hive.support.concurrency=true");
stmt.execute("set hive.enforce.bucketing=true");
stmt.execute("set hive.exec.dynamic.partition.mode=nonstrict");
stmt.execute("set hive.txn.manager=org.apache.hadoop.hive.ql.lockmgr.DbTxnManager");
stmt.execute("set hive.compactor.initiator.on=true");
stmt.execute("set hive.compactor.worker.threads=2");
String tableName = "hive_acid_test";
stmt.execute("drop table if exists " + tableName);
stmt.execute("create table " + tableName + " (id int, name string,department string) clustered by (department) into 3 buckets stored as orc TBLPROPERTIES ('transactional'='true')");
stmt.execute("insert into table hive_acid_test values(1,'jon','sales')");
}
}
尝试插入时收到以下异常:
Exception in thread "main" java.sql.SQLException: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.mr.MapRedTask at org.apache.hive.jdbc.HiveStatement.execute(HiveStatement.java:296) at promo.hive.sample.HiveJdbcClient.main(HiveJdbcClient.java:49)
从命令行运行相同的插入命令。请帮助我找到问题。
最佳答案
我能够重现问题,并检查了Hive服务器日志-hiveserver2.log。
现在这是一个已知问题-https://issues.apache.org/jira/browse/HIVE-8326
在Hive 1.1版中已修复
问题与您的ACID配置中使用的DbTxManager有关。
错误日志:
java.lang.NullPointerException
at org.apache.hadoop.hive.ql.lockmgr.DbTxnManager.heartbeat(DbTxnManager.java:254)
at org.apache.hadoop.hive.ql.exec.Heartbeater.heartbeat(Heartbeater.java:81)
at org.apache.hadoop.hive.ql.exec.mr.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:242)
at org.apache.hadoop.hive.ql.exec.mr.HadoopJobExecHelper.progress(HadoopJobExecHelper.java:547)
at org.apache.hadoop.hive.ql.exec.mr.ExecDriver.execute(ExecDriver.java:435)
at org.apache.hadoop.hive.ql.exec.mr.MapRedTask.execute(MapRedTask.java:137)
at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:160)
at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:85)
at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1604)
at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1364)
at org.apache.hadoop.hive.ql.Driver.runInternal(Driver.java:1177)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:1004)
at org.apache.hadoop.hive.ql.Driver.run(Driver.java:999)
关于java - 使用Hive JDBC连接的Hive ACID事务属性,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29398785/