1、问题描述，启动azkaban的时候报如下所示的错误。之前使用azkaban是root用户，今天使用hadoop用户进行配置和使用，报这个错，说是root连接mysql拒绝了。
1 [hadoop@slaver1 azkaban-web-2.5.0]$ bin/azkaban-web-start.sh 2 Using Hadoop from /home/hadoop/soft/hadoop-2.5.0-cdh5.3.6 3 Using Hive from /home/hadoop/soft/hive-0.13.1-cdh5.3.6 4 bin/.. 5 :bin/../lib/azkaban-2.5.0.jar:bin/../lib/commons-collections-3.2.1.jar:bin/../lib/commons-configuration-1.8.jar:bin/../lib/commons-dbcp-1.4.jar:bin/../lib/commons-dbutils-1.5.jar:bin/../lib/commons-email-1.2.jar:bin/../lib/commons-fileupload-1.2.1.jar:bin/../lib/commons-io-2.4.jar:bin/../lib/commons-jexl-2.1.1.jar:bin/../lib/commons-lang-2.6.jar:bin/../lib/commons-logging-1.1.1.jar:bin/../lib/commons-pool-1.6.jar:bin/../lib/guava-13.0.1.jar:bin/../lib/h2-1.3.170.jar:bin/../lib/httpclient-4.2.1.jar:bin/../lib/httpcore-4.2.1.jar:bin/../lib/jackson-core-asl-1.9.5.jar:bin/../lib/jackson-mapper-asl-1.9.5.jar:bin/../lib/jetty-6.1.26.jar:bin/../lib/jetty-util-6.1.26.jar:bin/../lib/joda-time-2.0.jar:bin/../lib/jopt-simple-4.3.jar:bin/../lib/junit-4.8.jar:bin/../lib/log4j-1.2.16.jar:bin/../lib/mail-1.4.5.jar:bin/../lib/mysql-connector-java-5.1.28.jar:bin/../lib/servlet-api-2.5.jar:bin/../lib/slf4j-api-1.6.1.jar:bin/../lib/slf4j-log4j12-1.6.4.jar:bin/../lib/velocity-1.7.jar:bin/../lib/velocity-tools-2.0.jar:bin/../extlib/*.jar:bin/../plugins/*/*.jar:/home/hadoop/soft/hadoop-2.5.0-cdh5.3.6/conf:/home/hadoop/soft/hadoop-2.5.0-cdh5.3.6/*:/home/hadoop/soft/hive-0.13.1-cdh5.3.6/conf:/home/hadoop/soft/hive-0.13.1-cdh5.3.6/lib/* 6 [hadoop@slaver1 azkaban-web-2.5.0]$ 2018/05/17 16:47:29.976 +0800 ERROR [AzkabanWebServer] [Azkaban] Starting Jetty Azkaban Executor... 7 2018/05/17 16:47:30.021 +0800 INFO [AzkabanServer] [Azkaban] Loading azkaban settings file from bin/../conf 8 2018/05/17 16:47:30.022 +0800 INFO [AzkabanServer] [Azkaban] Loading azkaban properties file 9 2018/05/17 16:47:30.067 +0800 INFO [AzkabanWebServer] [Azkaban] Setting up Jetty Https Server with port:8443 and numThreads:25 10 2018/05/17 16:47:30.135 +0800 INFO [log] [Azkaban] Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog 11 2018/05/17 16:47:30.247 +0800 INFO [AzkabanWebServer] [Azkaban] Loading user manager class azkaban.user.XmlUserManager 12 2018/05/17 16:47:30.690 +0800 INFO [XmlUserManager] [Azkaban] Loading user azkaban 13 2018/05/17 16:47:30.696 +0800 INFO [XmlUserManager] [Azkaban] Loading user metrics 14 2018/05/17 16:47:30.696 +0800 INFO [XmlUserManager] [Azkaban] Loading user admin 15 org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'slaver1' (using password: YES)) 16 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549) 17 at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) 18 at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) 19 at azkaban.database.DataSourceUtils$MySQLBasicDataSource$MonitorThread.pingDB(DataSourceUtils.java:186) 20 at azkaban.database.DataSourceUtils$MySQLBasicDataSource$MonitorThread.run(DataSourceUtils.java:174) 21 Caused by: java.sql.SQLException: Access denied for user 'root'@'slaver1' (using password: YES) 22 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1086) 23 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237) 24 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169) 25 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:928) 26 at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4736) 27 at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1342) 28 at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2493) 29 at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2526) 30 at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2311) 31 at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) 32 at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) 33 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 34 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 35 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 36 at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 37 at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 38 at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416) 39 at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:347) 40 at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) 41 at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) 42 at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) 43 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) 44 ... 4 more 45 Exception in thread "main" azkaban.executor.ExecutorManagerException: Error fetching active flows 46 at azkaban.executor.JdbcExecutorLoader.fetchActiveFlows(JdbcExecutorLoader.java:209) 47 at azkaban.executor.ExecutorManager.loadRunningFlows(ExecutorManager.java:146) 48 at azkaban.executor.ExecutorManager.<init>(ExecutorManager.java:84) 49 at azkaban.webapp.AzkabanWebServer.loadExecutorManager(AzkabanWebServer.java:248) 50 at azkaban.webapp.AzkabanWebServer.<init>(AzkabanWebServer.java:185) 51 at azkaban.webapp.AzkabanWebServer.main(AzkabanWebServer.java:726) 52 Caused by: org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'slaver1' (using password: YES)) 53 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549) 54 at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) 55 at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) 56 at org.apache.commons.dbutils.AbstractQueryRunner.prepareConnection(AbstractQueryRunner.java:175) 57 at org.apache.commons.dbutils.QueryRunner.query(QueryRunner.java:304) 58 at azkaban.executor.JdbcExecutorLoader.fetchActiveFlows(JdbcExecutorLoader.java:202) 59 ... 5 more 60 Caused by: java.sql.SQLException: Access denied for user 'root'@'slaver1' (using password: YES) 61 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1086) 62 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237) 63 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169) 64 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:928) 65 at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4736) 66 at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1342) 67 at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2493) 68 at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2526) 69 at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2311) 70 at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) 71 at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) 72 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 73 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 74 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 75 at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 76 at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 77 at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416) 78 at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:347) 79 at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) 80 at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) 81 at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) 82 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) 83 ... 10 more 84 2018/05/17 16:47:31.374 +0800 ERROR [DataSourceUtils] [Azkaban] MySQL connection test failed. Please check MySQL connection health! 85 ^C 86 [hadoop@slaver1 azkaban-web-2.5.0]$ org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Access denied for user 'root'@'slaver1' (using password: YES)) 87 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549) 88 at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) 89 at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) 90 at azkaban.database.DataSourceUtils$MySQLBasicDataSource$MonitorThread.pingDB(DataSourceUtils.java:186) 91 at azkaban.database.DataSourceUtils$MySQLBasicDataSource$MonitorThread.run(DataSourceUtils.java:174) 92 Caused by: java.sql.SQLException: Access denied for user 'root'@'slaver1' (using password: YES) 93 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1086) 94 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237) 95 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169) 96 at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:928) 97 at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4736) 98 at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1342) 99 at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2493) 100 at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2526) 101 at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2311) 102 at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:834) 103 at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) 104 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 105 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 106 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 107 at java.lang.reflect.Constructor.newInstance(Constructor.java:525) 108 at com.mysql.jdbc.Util.handleNewInstance(Util.java:411) 109 at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:416) 110 at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:347) 111 at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) 112 at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) 113 at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) 114 at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) 115 ... 4 more 116 2018/05/17 16:48:01.382 +0800 ERROR [DataSourceUtils] [Azkaban] MySQL connection test failed. Please check MySQL connection health!
2、解决方法如下所示：登陆你的mysql，然后授予权限，然后再刷新权限即可。
参考：https://blog.csdn.net/shp5174/article/details/55259064
1 [hadoop@slaver1 ~]$ mysql -uroot -p123456 2 Welcome to the MySQL monitor. Commands end with ; or g. 3 Your MySQL connection id is 32 4 Server version: 5.1.73 Source distribution 5 6 Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. 7 8 Oracle is a registered trademark of Oracle Corporation and/or its 9 affiliates. Other names may be trademarks of their respective 10 owners. 11 12 Type 'help;' or 'h' for help. Type 'c' to clear the current input statement. 13 14 mysql> GRANT ALL ON *.* to 'root'@'%' IDENTIFIED BY '123456'; 15 Query OK, 0 rows affected (0.00 sec) 16 17 mysql> FLUSH PRIVILEGES; 18 Query OK, 0 rows affected (0.00 sec) 19 20 mysql>
3、解决完问题以后，运行如下所示：
1 [hadoop@slaver1 azkaban-web-2.5.0]$ bin/azkaban-web-start.sh 2 Using Hadoop from /home/hadoop/soft/hadoop-2.5.0-cdh5.3.6 3 Using Hive from /home/hadoop/soft/hive-0.13.1-cdh5.3.6 4 bin/.. 5 :bin/../lib/azkaban-2.5.0.jar:bin/../lib/commons-collections-3.2.1.jar:bin/../lib/commons-configuration-1.8.jar:bin/../lib/commons-dbcp-1.4.jar:bin/../lib/commons-dbutils-1.5.jar:bin/../lib/commons-email-1.2.jar:bin/../lib/commons-fileupload-1.2.1.jar:bin/../lib/commons-io-2.4.jar:bin/../lib/commons-jexl-2.1.1.jar:bin/../lib/commons-lang-2.6.jar:bin/../lib/commons-logging-1.1.1.jar:bin/../lib/commons-pool-1.6.jar:bin/../lib/guava-13.0.1.jar:bin/../lib/h2-1.3.170.jar:bin/../lib/httpclient-4.2.1.jar:bin/../lib/httpcore-4.2.1.jar:bin/../lib/jackson-core-asl-1.9.5.jar:bin/../lib/jackson-mapper-asl-1.9.5.jar:bin/../lib/jetty-6.1.26.jar:bin/../lib/jetty-util-6.1.26.jar:bin/../lib/joda-time-2.0.jar:bin/../lib/jopt-simple-4.3.jar:bin/../lib/junit-4.8.jar:bin/../lib/log4j-1.2.16.jar:bin/../lib/mail-1.4.5.jar:bin/../lib/mysql-connector-java-5.1.28.jar:bin/../lib/servlet-api-2.5.jar:bin/../lib/slf4j-api-1.6.1.jar:bin/../lib/slf4j-log4j12-1.6.4.jar:bin/../lib/velocity-1.7.jar:bin/../lib/velocity-tools-2.0.jar:bin/../extlib/*.jar:bin/../plugins/*/*.jar:/home/hadoop/soft/hadoop-2.5.0-cdh5.3.6/conf:/home/hadoop/soft/hadoop-2.5.0-cdh5.3.6/*:/home/hadoop/soft/hive-0.13.1-cdh5.3.6/conf:/home/hadoop/soft/hive-0.13.1-cdh5.3.6/lib/* 6 [hadoop@slaver1 azkaban-web-2.5.0]$ 2018/05/17 17:10:33.069 +0800 ERROR [AzkabanWebServer] [Azkaban] Starting Jetty Azkaban Executor... 7 2018/05/17 17:10:33.096 +0800 INFO [AzkabanServer] [Azkaban] Loading azkaban settings file from bin/../conf 8 2018/05/17 17:10:33.096 +0800 INFO [AzkabanServer] [Azkaban] Loading azkaban properties file 9 2018/05/17 17:10:33.119 +0800 INFO [AzkabanWebServer] [Azkaban] Setting up Jetty Https Server with port:8443 and numThreads:25 10 2018/05/17 17:10:33.150 +0800 INFO [log] [Azkaban] Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog 11 2018/05/17 17:10:33.218 +0800 INFO [AzkabanWebServer] [Azkaban] Loading user manager class azkaban.user.XmlUserManager 12 2018/05/17 17:10:33.280 +0800 INFO [XmlUserManager] [Azkaban] Loading user azkaban 13 2018/05/17 17:10:33.289 +0800 INFO [XmlUserManager] [Azkaban] Loading user metrics 14 2018/05/17 17:10:33.289 +0800 INFO [XmlUserManager] [Azkaban] Loading user admin 15 2018/05/17 17:10:33.722 +0800 INFO [AzkabanWebServer] [Azkaban] Loading JDBC for project management 16 2018/05/17 17:10:33.726 +0800 INFO [ExecutorManager] [Azkaban] Cleaning old logs from execution_logs 17 2018/05/17 17:10:33.737 +0800 INFO [ProjectManager] [Azkaban] Project version retention is set to 3 18 2018/05/17 17:10:33.872 +0800 INFO [ExecutorManager] [Azkaban] Cleaning old log files before 2018-02-22T17:10:33.753+08:00 19 2018/05/17 17:10:33.874 +0800 INFO [ExecutorManager] [Azkaban] Cleaned up 0 log entries. 20 2018/05/17 17:10:33.950 +0800 INFO [TriggerManager] [Azkaban] TriggerManager loaded. 21 2018/05/17 17:10:33.950 +0800 INFO [AzkabanWebServer] [Azkaban] Loading built-in checker and action types 22 2018/05/17 17:10:33.967 +0800 INFO [CheckerTypeLoader] [Azkaban] Registering checker BasicTimeChecker 23 2018/05/17 17:10:33.968 +0800 INFO [CheckerTypeLoader] [Azkaban] Registering checker SlaChecker 24 2018/05/17 17:10:33.968 +0800 INFO [CheckerTypeLoader] [Azkaban] Registering checker ExecutionChecker 25 2018/05/17 17:10:33.968 +0800 INFO [ActionTypeLoader] [Azkaban] Registering action ExecuteFlowAction 26 2018/05/17 17:10:33.968 +0800 INFO [ActionTypeLoader] [Azkaban] Registering action KillExecutionAction 27 2018/05/17 17:10:33.968 +0800 INFO [ActionTypeLoader] [Azkaban] Registering action AlertAction 28 2018/05/17 17:10:33.968 +0800 INFO [ActionTypeLoader] [Azkaban] Registering action CreateTriggerAction 29 2018/05/17 17:10:33.968 +0800 INFO [AzkabanWebServer] [Azkaban] Loading trigger based scheduler 30 2018/05/17 17:10:33.973 +0800 INFO [AzkabanWebServer] [Azkaban] Loading plug-in checker and action types 31 2018/05/17 17:10:33.973 +0800 ERROR [AzkabanWebServer] [Azkaban] plugin path plugins/triggers doesn't exist! 32 2018/05/17 17:10:33.974 +0800 INFO [AzkabanWebServer] [Azkaban] Setting timezone to Asia/Shanghai 33 2018/05/17 17:10:33.974 +0800 INFO [AzkabanWebServer] [Azkaban] Registering MBeans... 34 2018/05/17 17:10:34.028 +0800 INFO [AzkabanWebServer] [Azkaban] Bean azkaban.jmx.JmxJettyServer registered. 35 2018/05/17 17:10:34.038 +0800 INFO [AzkabanWebServer] [Azkaban] Bean azkaban.jmx.JmxTriggerManager registered. 36 2018/05/17 17:10:34.049 +0800 INFO [AzkabanWebServer] [Azkaban] Bean azkaban.jmx.JmxExecutorManager registered. 37 2018/05/17 17:10:34.055 +0800 INFO [AzkabanWebServer] [Azkaban] Setting up web resource dir web/ 38 2018/05/17 17:10:34.179 +0800 INFO [JdbcTriggerLoader] [Azkaban] Loading all triggers from db. 39 2018/05/17 17:10:34.226 +0800 INFO [JdbcTriggerLoader] [Azkaban] Loaded 0 triggers. 40 2018/05/17 17:10:34.227 +0800 INFO [log] [Azkaban] jetty-6.1.26 41 2018/05/17 17:10:34.515 +0800 INFO [log] [Azkaban] Started SslSocketConnector@0.0.0.0:8443 42 2018/05/17 17:10:34.516 +0800 INFO [AzkabanWebServer] [Azkaban] Server running on ssl port 8443. 43 44 [hadoop@slaver1 azkaban-web-2.5.0]$