“信息：尚未创建 Tez 会话。正在打开会话”挂起答案

【问题标题】："INFO : Tez session hasn't been created yet. Opening session" hang“信息：尚未创建 Tez 会话。正在打开会话”挂起
【发布时间】：2016-07-13 06:24:02
【问题描述】：

我正在使用 HDP 2.3.0.0-2557，我正在尝试运行如下配置单元查询：

beeline> !connect jdbc:hive2://localhost:10000
Connecting to jdbc:hive2://localhost:10000
Enter username for jdbc:hive2://localhost:10000: root
Enter password for jdbc:hive2://localhost:10000: ******
Connected to: Apache Hive (version 1.2.1.2.3.0.0-2557)
Driver: Hive JDBC (version 1.2.1.2.3.0.0-2557)
Transaction isolation: TRANSACTION_REPEATABLE_READ
0: jdbc:hive2://localhost:10000> select * from iitest1;
+----------------+----------------+----------------+----------------+----------------+----------------+-------------------------------------------------------------------------------------------------------+--+
| iitest1.it1c1  | iitest1.it1c2  | iitest1.it1c3  | iitest1.it1c4  | iitest1.it1c5  | iitest1.it1c6   |                                             iitest1.it1c7                                             |
+----------------+----------------+----------------+----------------+----------------+----------------+-------------------------------------------------------------------------------------------------------+--+
| 10             | 84000          | A              | A              | Jonathan       | Liu            | DGGBNEKBRXLBGKTPAGNPEBOQPIPDUAJLTLMRATQPKFPULKKXKGFFWHGOXFFJFLIFKITHKUQSPNFLQKFUIWHXLSTHPBKLMNUSQWOB  |
| 56             | 46000          | F              | F              | 12345          | 12345          | GIIWEVNSPPRLRDKWIXAUFHVNNJISHUWQADQMLWDBRWKWFSXDDXBGDVFRAWEOBTXXRTMMMAOIQUSQBEUGMQKNHFEBFUQECDAOWJMN  |
| 45             | 77000          | K              | K              | Lucy           | King           | HJMTHFFEQBSSCHWSGKNHIQFNKMQFNQHQKNTGSRLVFFJXOAFTDARTMVOCWFIAMICLAVCJBWVKQWAPLBEXMLDGGSVVDJXBDTFLQORQ  |
| NULL           | 77000          | K              | K              | Lucy           | King           | HJMTHFFEQBSSCHWSGKNHIQFNKMQFNQHQKNTGSRLVFFJXOAFTDARTMVOCWFIAMICLAVCJBWVKQWAPLBEXMLDGGSVVDJXBDTFLQORQ  |
+----------------+----------------+----------------+----------------+----------------+----------------+-------------------------------------------------------------------------------------------------------+--+
4 rows selected (8.578 seconds)
0: jdbc:hive2://localhost:10000> select max(it1c1) from iitest1;
INFO  : Tez session hasn't been created yet. Opening session

之后，什么都没有出现，似乎“Tez”出了点问题

此外，我正在尝试使用“mapreduce”而不是“tez”运行相同的查询，并且 mapreduce 作业也挂起（使用 hive -hiveconf hive.execution.engine=mr 启动 hive CLI

hive> select max(IT1C1+IT1C2) from iitest1;
Query ID = root_20160713172448_09ccc9e6-c70d-4e56-b428-e511f62db9a6
Total jobs = 1
Launching Job 1 out of 1
Number of reduce tasks determined at compile time: 1
In order to change the average load for a reducer (in bytes):
  set hive.exec.reducers.bytes.per.reducer=<number>
In order to limit the maximum number of reducers:
  set hive.exec.reducers.max=<number>
In order to set a constant number of reducers:
  set mapreduce.job.reduces=<number>
Starting Job = job_1468423564920_0003, Tracking URL = http://sandbox.hortonworks.com:8088/proxy/application_1468423564920_0003/
Kill Command = /usr/hdp/2.3.0.0-2557/hadoop/bin/hadoop job  -kill job_1468423564920_0003
Interrupting... Be patient, this might take some time.
Press Ctrl+C again to kill JVM
killing job with: job_1468423564920_0003
Hadoop job information for Stage-1: number of mappers: 0; number of reducers: 0
2016-07-13 17:49:56,510 Stage-1 map = 0%,  reduce = 0%
Ended Job = job_1468423564920_0003 with errors
Error during job, obtaining debugging information...
FAILED: Execution Error, return code 2 from  org.apache.hadoop.hive.ql.exec.mr.MapRedTask
MapReduce Jobs Launched: 
Stage-Stage-1:  HDFS Read: 0 HDFS Write: 0 FAIL
Total MapReduce CPU Time Spent: 0 msec
hive> exit
    > ;

我想知道是否有人可以提供一些关于如何解决问题的建议？

非常感谢！

编辑 1： 我找到了以下 link 并根据链接，似乎没有足够的资源供 tez 使用。所以，我想知道如何清理占用的资源，以便为 tez 提供足够的资源。

【问题讨论】：

标签： hadoop mapreduce hive tez

【解决方案1】：

我也遇到过类似的问题。可能是另一个进程阻止了您的 Tez 会话运行 - 在我的情况下，是 Spark Thrift 服务器阻止了它。监视 ResourceManager 节点上的内容（Web UI 默认端口为 8088，参见页面底部here）。一旦 Thrift 服务器被杀死，它就会像魅力一样运行！

【讨论】：

【解决方案2】：

我和你有同样的问题。

我通过修改以下解决了它..

减少 Tez 配置：tez.am.resource.memory.mb =256

默认 2048 。

and 增加 Yarn ：为一个节点上的所有 YARN 容器分配的内存。

我猜在 hive cli 上使用 Tez 需要 {tez.am.resource.memory.mb} 内存。当{为节点上的所有 YARN 容器分配的内存}没有足够的内存时。然后Application-id就挂了。

【讨论】：