java通过phoenix的jdbc链接hbase数据库遇到如下情况：
查看日志发现phoenix维护的表system.function 的文件缺失了（在hdfs上），就是有节点掉了。
用命令
$HBASE_PATH/bin/hbase hbck
查看确实有blk丢失，就是应为node掉了。
hdfs.DFSClient: Could not obtain BP-886382026-192.168.1.20-1515141616941:blk_1074071596_330784 from any node:
java.io.IOException: No live nodes contain current block No live nodes contain current block Block locations: Dead nodes: . Will get new block locations from namenode and retry...
在用 hdfs dfsadmin -report
查看是哪个节点掉了，重新启动掉线的节点以及守护进程，之后在运行代码，完美通过！
以下是报错的堆栈信息：
19/01/08 11:13:49 INFO zookeeper.ClientCnxn: EventThread shut down org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (SYSTEM.FUNCTION) at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1549) at org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1388) at org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:1044) at com.rs.java.db.CreatConnect.getPhoeConnect(CreatConnect.java:45) at com.rs.java.mapreduce.oneTuoN.largebandwidth.TheTest.main(TheTest.java:25) 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.util.RunJar.run(RunJar.java:239) at org.apache.hadoop.util.RunJar.main(RunJar.java:153) Caused by: org.apache.phoenix.exception.PhoenixIOException: SYSTEM.FUNCTION at org.apache.phoenix.util.ServerUtil.parseServerException(ServerUtil.java:116) at org.apache.phoenix.query.ConnectionQueryServicesImpl.ensureTableCreated(ConnectionQueryServicesImpl.java:1153) at org.apache.phoenix.query.ConnectionQueryServicesImpl.createTable(ConnectionQueryServicesImpl.java:1434) at org.apache.phoenix.schema.MetaDataClient.createTableInternal(MetaDataClient.java:2624) at org.apache.phoenix.schema.MetaDataClient.createTable(MetaDataClient.java:1040) at org.apache.phoenix.compile.CreateTableCompiler$2.execute(CreateTableCompiler.java:212) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:393) at org.apache.phoenix.jdbc.PhoenixStatement$2.call(PhoenixStatement.java:376) at org.apache.phoenix.call.CallRunner.run(CallRunner.java:53) at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:374) at org.apache.phoenix.jdbc.PhoenixStatement.executeMutation(PhoenixStatement.java:363) at org.apache.phoenix.jdbc.PhoenixStatement.execute(PhoenixStatement.java:1707) at org.apache.phoenix.query.ConnectionQueryServicesImpl.createOtherSystemTables(ConnectionQueryServicesImpl.java:2555) at org.apache.phoenix.query.ConnectionQueryServicesImpl.access$900(ConnectionQueryServicesImpl.java:264) at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:2466) at org.apache.phoenix.query.ConnectionQueryServicesImpl$12.call(ConnectionQueryServicesImpl.java:2389) at org.apache.phoenix.util.PhoenixContextExecutor.call(PhoenixContextExecutor.java:76) at org.apache.phoenix.query.ConnectionQueryServicesImpl.init(ConnectionQueryServicesImpl.java:2389) at org.apache.phoenix.jdbc.PhoenixDriver.getConnectionQueryServices(PhoenixDriver.java:255) at org.apache.phoenix.jdbc.PhoenixEmbeddedDriver.createConnection(PhoenixEmbeddedDriver.java:150) at org.apache.phoenix.jdbc.PhoenixDriver.connect(PhoenixDriver.java:221) at org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38) at org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:582) at org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1556) at org.apache.commons.dbcp.BasicDataSource.createPoolableConnectionFactory(BasicDataSource.java:1545) ... 10 more Caused by: org.apache.hadoop.ipc.RemoteException(org.apache.hadoop.hbase.TableExistsException): SYSTEM.FUNCTION at org.apache.hadoop.hbase.master.procedure.CreateTableProcedure.prepareCreate(CreateTableProcedure.java:286) at org.apache.hadoop.hbase.master.procedure.CreateTableProcedure.executeFromState(CreateTableProcedure.java:107) at org.apache.hadoop.hbase.master.procedure.CreateTableProcedure.executeFromState(CreateTableProcedure.java:59) at org.apache.hadoop.hbase.procedure2.StateMachineProcedure.execute(StateMachineProcedure.java:139) at org.apache.hadoop.hbase.procedure2.Procedure.doExecute(Procedure.java:499) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execProcedure(ProcedureExecutor.java:1148) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execLoop(ProcedureExecutor.java:943) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execLoop(ProcedureExecutor.java:896) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor.access$400(ProcedureExecutor.java:78) at org.apache.hadoop.hbase.procedure2.ProcedureExecutor$2.run(ProcedureExecutor.java:498) Exception in thread "main" java.lang.NullPointerException at com.rs.java.mapreduce.oneTuoN.largebandwidth.TheTest.main(TheTest.java:27) 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.util.RunJar.run(RunJar.java:239) at org.apache.hadoop.util.RunJar.main(RunJar.java:153)