Ambari Hive 無法正常查詢 問題分析處理
阿新 • • 發佈：2018-03-07
mysql 大小寫 hive inconsistent 1.今天遇到一個錯誤，在連接到hive之後，無法執行任何命令。
$ beeline -u "jdbc:hive2://hostname.domain.cn:10000/default;principal=hive/[email protected];" Connecting to jdbc:hive2://hostname.domain.cn:10000/default;principal=hive/[email protected]; Connected to: Apache Hive (version release-1.2.1-EDH-1.1.2) Driver: Hive JDBC (version release-1.2.1-EDH-1.1.2) Transaction isolation: TRANSACTION_REPEATABLE_READ Beeline version release-1.2.1-EDH-1.1.2 by Apache Hive 0: jdbc:hive2://hostname.domain.cn:10000> show databases;
返回錯誤如下
Error: Error while processing statement: FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.DDLTask. MetaException (message:For direct MetaStore DB connections, we don't support retries at the client level.) (state=08S01,code=1)
2. 百度這個錯誤，很多文檔都提及是字符集的問題，需要保證mysql的字符集是latin1.
mysql> show variables like '%collation_%'; +----------------------+-------------------+ | Variable_name | Value | +----------------------+-------------------+ | collation_connection | latin1_swedish_ci | | collation_database | latin1_swedish_ci | | collation_server | latin1_swedish_ci | +----------------------+-------------------+
3. 如果字符集不是latin1，需要手動執行(本次問題，不是這個，我的字符集，原本就是latin1)
mysql>use hive mysql>alter database hive character set latin1;
4. 後來嘗試重啟一下hive，結果，metastore竟然啟動失敗。查看日誌，說創建表失敗。這個hive已經運行一段時間了，一直沒有問題。對應的表也都是存在的，沒有道理重建的。
5.日誌輸出如下：
Traceback (most recent call last):
File "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_metastore.py", line 259, in <module>
HiveMetastore().execute()
File "/usr/lib/python2.6/site-packages/resource_management/libraries/script/script.py", line 280, in execute
method(env)
File "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_metastore.py", line 59, in start
self.configure(env)
File "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive_metastore.py", line 73, in configure
hive(name = 'metastore')
File "/usr/lib/python2.6/site-packages/ambari_commons/os_family_impl.py", line 89, in thunk
return fn(*args, **kwargs)
File "/var/lib/ambari-agent/cache/common-services/HIVE/0.12.0.2.0/package/scripts/hive.py", line 320, in hive
user = params.hive_user
File "/usr/lib/python2.6/site-packages/resource_management/core/base.py", line 155, in __init__
self.env.run()
File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 160, in run
self.run_action(resource, action)
File "/usr/lib/python2.6/site-packages/resource_management/core/environment.py", line 124, in run_action
provider_action()
File "/usr/lib/python2.6/site-packages/resource_management/core/providers/system.py", line 273, in action_run
tries=self.resource.tries, try_sleep=self.resource.try_sleep)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 71, in inner
result = function(command, **kwargs)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 93, in checked_call
tries=tries, try_sleep=try_sleep)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 141, in _call_wrapper
result = _call(command, **kwargs_copy)
File "/usr/lib/python2.6/site-packages/resource_management/core/shell.py", line 294, in _call
raise Fail(err_msg)
resource_management.core.exceptions.Fail: Execution of 'export HIVE_CONF_DIR=/usr/hdp/current/hive-metastore/conf/conf.server ; /usr/hdp/current/hive-metastore/bin/schematool -initSchema -dbType mysql -userName hive -passWord [PROTECTED] -verbose' returned 1. Metastore connection URL: jdbc:mysql://hostname.mysql.cn/hivemeta
Metastore Connection Driver : com.mysql.jdbc.Driver
Metastore connection User: hive
Starting metastore schema initialization to 1.2.0
Initialization script hive-schema-1.2.0.mysql.sql
Connecting to jdbc:mysql://hostname.mysql.cn/hivemeta
Connected to: MySQL (version 5.1.73)
Driver: MySQL Connector Java (version mysql-connector-java-5.1.40 ( Revision: 402933ef52cad9aa82624e80acbea46e3a701ce6 ))
Transaction isolation: TRANSACTION_READ_COMMITTED
0: jdbc:mysql://hostname.mysql.cn/hivem> !autocommit on
Autocommit status: true
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET @OLD_CHARACTER_SET_C
LIENT=@@CHARACTER_SET_CLIENT */
No rows affected (0.003 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET @OLD_CHARACTER_SET_R
ESULTS=@@CHARACTER_SET_RESULTS */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET @OLD_COLLATION_CONNE
CTION=@@COLLATION_CONNECTION */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET NAMES utf8 */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40103 SET @OLD_TIME_ZONE=@@TIM
E_ZONE */
No rows affected (0.002 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40103 SET TIME_ZONE='+00:00' *
/
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40014 SET @OLD_UNIQUE_CHECKS=@
@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40014 SET @OLD_FOREIGN_KEY_CHE
CKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */
No rows affected (0.001 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET @OLD_SQL_MODE=@@SQL_
MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40111 SET @OLD_SQL_NOTES=@@SQL
_NOTES, SQL_NOTES=0 */
No rows affected (0.001 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET @saved_cs_client
= @@character_set_client */
No rows affected (0 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> /*!40101 SET character_set_client
= utf8 */
No rows affected (0.001 seconds)
0: jdbc:mysql://hostname.mysql.cn/hivem> CREATE TABLE IF NOT EXISTS `BUCKE
TING_COLS` ( `SD_ID` bigint(20) NOT NULL, `BUCKET_COL_NAME` varchar(256) CHARACT
ER SET latin1 COLLATE latin1_bin DEFAULT NULL, `INTEGER_IDX` int(11) NOT NULL, P
RIMARY KEY (`SD_ID`,`INTEGER_IDX`), KEY `BUCKETING_COLS_N49` (`SD_ID`), CONSTRAI
NT `BUCKETING_COLS_FK1` FOREIGN KEY (`SD_ID`) REFERENCES `SDS` (`SD_ID`) ) ENGIN
E=InnoDB DEFAULT CHARSET=latin1
Error: Can't create table 'hivemeta.bucketing_cols' (errno: 121) (state=HY000,code=1005)
Closing: 0: jdbc:mysql://hostname.mysql.cn/hivemeta
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!
org.apache.hadoop.hive.metastore.HiveMetaException: Schema initialization FAILED! Metastore state would be inconsistent !!
at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:270)
at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:243)
at org.apache.hive.beeline.HiveSchemaTool.main(HiveSchemaTool.java:473)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.run(RunJar.java:221)
at org.apache.hadoop.util.RunJar.main(RunJar.java:136)
Caused by: java.io.IOException: Schema script failed, errorcode 2
at org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:358)
at org.apache.hive.beeline.HiveSchemaTool.runBeeLine(HiveSchemaTool.java:326)
at org.apache.hive.beeline.HiveSchemaTool.doInit(HiveSchemaTool.java:266)
... 8 more
*** schemaTool failed ***6.根據關鍵字“Schema initialization FAILED! Metastore state would be inconsistent !!”，查詢到hdp的官方論壇。
解釋說，這個是一個已知的問題。需要修改ambari的sql腳本，刪除mysql的一些index等。
https://community.hortonworks.com/questions/113748/hive-metastore-start.html
7. 官方建議的步驟繁多。個人比較懶。而且這個hive庫，前一天還是正常的。這個問題是突然出現的，我不傾向與，這個是bug的可能。
繼續分析，查看hivemetastore的log，還是有必要的。
發現問題，表不存在
2018-03-07 15:34:43,871 INFO [pool-8-thread-200]: metastore.HiveMetaStore (HiveMetaStore.java:logInfo(746)) - 200: get_all_databases 2018-03-07 15:34:43,871 INFO [pool-8-thread-200]: HiveMetaStore.audit (HiveMetaStore.java:logAuditEvent(371)) - [email protected] ip=/172.18.98.57 cmd=get_all_databases 2018-03-07 15:34:43,873 ERROR [pool-8-thread-200]: metastore.RetryingHMSHandler (RetryingHMSHandler.java:invoke(165)) - HMSHandler Fatal error: javax.jdo.JDOException: Exception thrown when executing query at org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:596) ...... NestedThrowablesStackTrace: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'hivemeta.dbs' doesn't exist at sun.reflect.GeneratedConstructorAccessor60.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
8.現在要從mysql入手分析，逐步檢查。
mysql> use hive mysql> show tables; +---------------------------+ | Tables_in_hivemeta | +---------------------------+ | BUCKETING_COLS | | CDS | | COLUMNS_V2 | | COMPACTION_QUEUE | | COMPLETED_TXN_COMPONENTS | | DATABASE_PARAMS | | DBS | | DB_PRIVS | | DELEGATION_TOKENS |
9. 問題來了，表不存在。為什麽不存在呢？其實我已經知道問題了。Mysql表名大小寫敏感問題。
mysql>select count(*) from `DBS`; ERROR 1146 (42S02): Table 'hivemeta.DBS' doesn't exist
10. 由於很多Oracle數據庫的表名是大小寫不敏感的。但是Mysql卻是表名大小寫敏感的。所以，很多開發人員，都喜歡將mysql設置為表名大小寫不敏感。
而show tables之後，我就懷疑這個可能了。
11. 經過檢查/etc/my.cnf，確實已經設置lower_case_table_names=1
12. Hive庫創建的時候，mysql是大小寫敏感的。所以，表名都是大寫的。而後期，有人修改了mysql參數，取消大小寫敏感。這樣，問題就來了。Mysql並不是完全不敏感，而是在設置參數lower_case_table_names=1 之後，創建和查詢的sql語句中的表名，默認修改為小寫的。而已經創建的表名，還是大寫的顯示。但是你無論用大寫表名，還是小寫表名，都無法正確查詢到了。
13. 這個問題出現的場景：
只有是在hive庫創建完成之後，又修改/etc/my.cnf，添加參數lower_case_table_names=1導致的。
14. 問題找到之後，有兩個解決方案：
a. 取消參數lower_case_table_names=1
b. 如果mysql的hive庫中沒有什麽數據，刪除hive庫表，重新創建hive meta表，直接就創建出小寫的表名了。
輸出就是小寫的了：
mysql> show tables; +---------------------------+ | Tables_in_hive_beta | +---------------------------+ | bucketing_cols | | cds | | columns_v2 | | compaction_queue | | completed_txn_components | | database_params | | db_privs | | dbs | | delegation_tokens | | func_ru |
15. 我最後選擇取消參數lower_case_table_names=1，並重啟mysql。查詢正常了。
mysql> select count(*) from `DBS`; +----------+ | count(*) | +----------+ | 2 |
16. Ambari啟動hive metastore也成功了。
問題解決，一切恢復正常
$ beeline -u "jdbc:hive2://hostname.domain.cn:10000/default;principal=hive/[email protected];" Connecting to jdbc:hive2://hostname.domain.cn:10000/default;principal=hive/[email protected]; Connected to: Apache Hive (version release-1.2.1-EDH-1.1.2) Driver: Hive JDBC (version release-1.2.1-EDH-1.1.2) Transaction isolation: TRANSACTION_REPEATABLE_READ Beeline version release-1.2.1-EDH-1.1.2 by Apache Hive 0: jdbc:hive2://hostname.domain.cn:10000> show databases; +----------------+--+ | database_name | +----------------+--+ | default | | hbjt | +----------------+--+ 2 rows selected (1.206 seconds)
最終的原因，就是有人修改的/etc/my.cnf，導致的本次問題。
Ambari Hive 無法正常查詢 問題分析處理