HI, kylin team:

There is something wrong with the connection from mysql.
#
Kylin version: 2.5.0-hadoop3.1 for hbase 2.0
#
NestedThrowables:
java.sql.SQLException: Unable to open a test connection to the given database. 
JDBC url = 
jdbc:mysql://metadb-forhivereplica.c5yzcdreb1xr.us-east-1.rds.amazonaws.com:3306/hive_emr_test?characterEncoding=UTF-8&useSSL=true,
 username = root. Terminating connection pool (set lazyInit to true if you 
expect to start your database after your app). Original Exception: ------
java.sql.SQLException: null,  message from server: "Host '172.31.26.19' is 
blocked because of many connection errors; unblock with 'mysqladmin 
flush-hosts'"
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
        at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1095)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
        at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
        at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        at sun.reflect.GeneratedConstructorAccessor91.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
        at 
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361)
        at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:416)
        at 
com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120)
        at 
org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483)
        at 
org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:297)
        at sun.reflect.GeneratedConstructorAccessor125.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
        at 
org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)
        at 
org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133)
        at 
org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:422)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:817)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:334)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:213)
        at sun.reflect.GeneratedMethodAccessor147.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at javax.jdo.JDOHelper$16.run(JDOHelper.java:1975)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.jdo.JDOHelper.invoke(JDOHelper.java:1970)
        at 
javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1177)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:814)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:702)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:519)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:548)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initializeHelper(ObjectStore.java:403)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:340)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:301)
        at 
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:77)
        at 
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:137)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.<init>(RawStoreProxy.java:58)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStoreForConf(HiveMetaStore.java:624)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:590)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:655)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6893)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:164)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$CacheableHiveMetaStoreClient.<init>(HiveClientCache.java:409)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1699)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:83)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:133)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:118)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$5.call(HiveClientCache.java:297)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$5.call(HiveClientCache.java:292)
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4767)
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3568)
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2350)
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2313)
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2228)
        at com.google.common.cache.LocalCache.get(LocalCache.java:3965)
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4764)
        at 
org.apache.hive.hcatalog.common.HiveClientCache.getOrCreate(HiveClientCache.java:292)
        at 
org.apache.hive.hcatalog.common.HiveClientCache.get(HiveClientCache.java:267)
        at 
org.apache.hive.hcatalog.common.HCatUtil.getHiveMetastoreClient(HCatUtil.java:558)
        at 
org.apache.hive.hcatalog.mapreduce.InitializeInput.getInputJobInfo(InitializeInput.java:104)
        at 
org.apache.hive.hcatalog.mapreduce.InitializeInput.setInput(InitializeInput.java:88)
        at 
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:95)
        at 
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:51)
        at 
org.apache.kylin.source.hive.HiveMRInput$HiveTableInputFormat.configureJob(HiveMRInput.java:94)
        at 
org.apache.kylin.engine.mr.steps.FactDistinctColumnsJob.setupMapper(FactDistinctColumnsJob.java:122)
        at 
org.apache.kylin.engine.mr.steps.FactDistinctColumnsJob.run(FactDistinctColumnsJob.java:100)
        at 
org.apache.kylin.engine.mr.common.MapReduceExecutable.doWork(MapReduceExecutable.java:131)
        at 
org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:163)
        at 
org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:70)
        at 
org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:163)
        at 
org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:114)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
------

        at 
org.datanucleus.api.jdo.NucleusJDOHelper.getJDOExceptionForNucleusException(NucleusJDOHelper.java:529)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:830)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:334)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:213)
        at sun.reflect.GeneratedMethodAccessor147.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at javax.jdo.JDOHelper$16.run(JDOHelper.java:1975)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.jdo.JDOHelper.invoke(JDOHelper.java:1970)
        at 
javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1177)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:814)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:702)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:519)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:548)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initializeHelper(ObjectStore.java:403)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:340)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:301)
        at 
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:77)
        at 
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:137)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.<init>(RawStoreProxy.java:58)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStoreForConf(HiveMetaStore.java:624)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:590)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:655)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
        ... 41 more
Caused by: java.sql.SQLException: Unable to open a test connection to the given 
database. JDBC url = 
jdbc:mysql://metadb-forhivereplica.c5yzcdreb1xr.us-east-1.rds.amazonaws.com:3306/hive_emr_test?characterEncoding=UTF-8&useSSL=true,
 username = root. Terminating connection pool (set lazyInit to true if you 
expect to start your database after your app). Original Exception: ------
java.sql.SQLException: null,  message from server: "Host '172.31.26.19' is 
blocked because of many connection errors; unblock with 'mysqladmin 
flush-hosts'"
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
        at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1095)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
        at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
        at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        at sun.reflect.GeneratedConstructorAccessor91.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
        at 
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361)
        at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:416)
        at 
com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120)
        at 
org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483)
        at 
org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:297)
        at sun.reflect.GeneratedConstructorAccessor125.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
        at 
org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)
        at 
org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133)
        at 
org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:422)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:817)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.createPersistenceManagerFactory(JDOPersistenceManagerFactory.java:334)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.getPersistenceManagerFactory(JDOPersistenceManagerFactory.java:213)
        at sun.reflect.GeneratedMethodAccessor147.invoke(Unknown Source)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at javax.jdo.JDOHelper$16.run(JDOHelper.java:1975)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.jdo.JDOHelper.invoke(JDOHelper.java:1970)
        at 
javax.jdo.JDOHelper.invokeGetPersistenceManagerFactoryOnImplementation(JDOHelper.java:1177)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:814)
        at javax.jdo.JDOHelper.getPersistenceManagerFactory(JDOHelper.java:702)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPMF(ObjectStore.java:519)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.getPersistenceManager(ObjectStore.java:548)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initializeHelper(ObjectStore.java:403)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.initialize(ObjectStore.java:340)
        at 
org.apache.hadoop.hive.metastore.ObjectStore.setConf(ObjectStore.java:301)
        at 
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:77)
        at 
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:137)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.<init>(RawStoreProxy.java:58)
        at 
org.apache.hadoop.hive.metastore.RawStoreProxy.getProxy(RawStoreProxy.java:67)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.newRawStoreForConf(HiveMetaStore.java:624)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMSForConf(HiveMetaStore.java:590)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.getMS(HiveMetaStore.java:584)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:655)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:427)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.invokeInternal(RetryingHMSHandler.java:148)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.invoke(RetryingHMSHandler.java:107)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:79)
        at 
org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:92)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:6893)
        at 
org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:164)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$CacheableHiveMetaStoreClient.<init>(HiveClientCache.java:409)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1699)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:83)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:133)
        at 
org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:118)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$5.call(HiveClientCache.java:297)
        at 
org.apache.hive.hcatalog.common.HiveClientCache$5.call(HiveClientCache.java:292)
        at 
com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4767)
        at 
com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3568)
        at 
com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2350)
        at 
com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2313)
        at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2228)
        at com.google.common.cache.LocalCache.get(LocalCache.java:3965)
        at 
com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4764)
        at 
org.apache.hive.hcatalog.common.HiveClientCache.getOrCreate(HiveClientCache.java:292)
        at 
org.apache.hive.hcatalog.common.HiveClientCache.get(HiveClientCache.java:267)
        at 
org.apache.hive.hcatalog.common.HCatUtil.getHiveMetastoreClient(HCatUtil.java:558)
        at 
org.apache.hive.hcatalog.mapreduce.InitializeInput.getInputJobInfo(InitializeInput.java:104)
        at 
org.apache.hive.hcatalog.mapreduce.InitializeInput.setInput(InitializeInput.java:88)
        at 
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:95)
        at 
org.apache.hive.hcatalog.mapreduce.HCatInputFormat.setInput(HCatInputFormat.java:51)
        at 
org.apache.kylin.source.hive.HiveMRInput$HiveTableInputFormat.configureJob(HiveMRInput.java:94)
        at 
org.apache.kylin.engine.mr.steps.FactDistinctColumnsJob.setupMapper(FactDistinctColumnsJob.java:122)
        at 
org.apache.kylin.engine.mr.steps.FactDistinctColumnsJob.run(FactDistinctColumnsJob.java:100)
        at 
org.apache.kylin.engine.mr.common.MapReduceExecutable.doWork(MapReduceExecutable.java:131)
        at 
org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:163)
        at 
org.apache.kylin.job.execution.DefaultChainedExecutable.doWork(DefaultChainedExecutable.java:70)
        at 
org.apache.kylin.job.execution.AbstractExecutable.execute(AbstractExecutable.java:163)
        at 
org.apache.kylin.job.impl.threadpool.DefaultScheduler$JobRunner.run(DefaultScheduler.java:114)
        at 
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
        at 
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
        at java.lang.Thread.run(Thread.java:748)
------

        at sun.reflect.GeneratedConstructorAccessor127.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.jolbox.bonecp.PoolUtil.generateSQLException(PoolUtil.java:192)
        at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:422)
        at 
com.jolbox.bonecp.BoneCPDataSource.getConnection(BoneCPDataSource.java:120)
        at 
org.datanucleus.store.rdbms.ConnectionFactoryImpl$ManagedConnectionImpl.getConnection(ConnectionFactoryImpl.java:483)
        at 
org.datanucleus.store.rdbms.RDBMSStoreManager.<init>(RDBMSStoreManager.java:297)
        at sun.reflect.GeneratedConstructorAccessor125.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at 
org.datanucleus.plugin.NonManagedPluginRegistry.createExecutableExtension(NonManagedPluginRegistry.java:606)
        at 
org.datanucleus.plugin.PluginManager.createExecutableExtension(PluginManager.java:301)
        at 
org.datanucleus.NucleusContextHelper.createStoreManagerForProperties(NucleusContextHelper.java:133)
        at 
org.datanucleus.PersistenceNucleusContextImpl.initialise(PersistenceNucleusContextImpl.java:422)
        at 
org.datanucleus.api.jdo.JDOPersistenceManagerFactory.freezeConfiguration(JDOPersistenceManagerFactory.java:817)
        ... 71 more
Caused by: java.sql.SQLException: null,  message from server: "Host 
'172.31.26.19' is blocked because of many connection errors; unblock with 
'mysqladmin flush-hosts'"
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
        at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1095)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
        at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
        at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
        at sun.reflect.GeneratedConstructorAccessor91.newInstance(Unknown 
Source)
        at 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
        at 
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
        at java.sql.DriverManager.getConnection(DriverManager.java:664)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at com.jolbox.bonecp.BoneCP.obtainRawInternalConnection(BoneCP.java:361)
        at com.jolbox.bonecp.BoneCP.<init>(BoneCP.java:416)
        ... 82 more

#
Best wishes!
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