我将oracle表卸载到hdfs时出错，这是命令：
sqoop import -Dmapreduce.job.queuename=root.username \
--connect jdbc:oracle:thin:@//someExadataHostname/dbInstance \
--username user \
--password welcome1 \
--table TB_RECHARGE_DIM_APPLICATION \
--target-dir /data/in/sqm/dev/unprocessed/sqoop/oracle_db_exa_test \
--delete-target-dir \
--m 1
它会抛出错误：
Warning: /opt/cloudera/parcels/CDH-5.10.1-1.cdh5.10.1.p0.10/bin/../lib/sqoop/../accumulo does not exist! Accumulo imports will fail.
Please set $ACCUMULO_HOME to the root of your Accumulo installation.
18/01/10 14:27:24 INFO sqoop.Sqoop: Running Sqoop version: 1.4.6-cdh5.10.1
18/01/10 14:27:24 WARN tool.BaseSqoopTool: Setting your password on the command-line is insecure. Consider using -P instead.
18/01/10 14:27:24 INFO teradata.TeradataManagerFactory: Loaded connector factory for 'Cloudera Connector Powered by Teradata' on version 1.5c5
18/01/10 14:27:25 INFO oracle.OraOopManagerFactory: Data Connector for Oracle and Hadoop is disabled.
18/01/10 14:27:25 INFO manager.SqlManager: Using default fetchSize of 1000
18/01/10 14:27:25 INFO tool.CodeGenTool: Beginning code generation
18/01/10 14:27:29 INFO manager.OracleManager: Time zone has been set to GMT
18/01/10 14:27:29 INFO manager.SqlManager: Executing SQL statement: SELECT t.* FROM TB_RECHARGE_DIM_APPLICATION t WHERE 1=0
18/01/10 14:27:29 INFO orm.CompilationManager: HADOOP_MAPRED_HOME is /opt/cloudera/parcels/CDH/lib/hadoop-mapreduce
Note: /tmp/s/compile/926451c21b6a6623f9763b96c7afa503/TB_RECHARGE_DIM_APPLICATION.java uses or overrides a deprecated API.
Note: Recompile with -Xlint:deprecation for details.
18/01/10 14:27:31 INFO orm.CompilationManager: Writing jar file: /tmp/compile/926451c21b6a6623f9763b96c7afa503/TB_RECHARGE_DIM_APPLICATION.jar
18/01/10 14:27:32 INFO tool.ImportTool: Destination directory /data/in/sqm/dev/unprocessed/sqoop/oracle_db_exa_test deleted.
18/01/10 14:27:32 INFO manager.OracleManager: Time zone has been set to GMT
18/01/10 14:27:34 INFO manager.OracleManager: Time zone has been set to GMT
18/01/10 14:27:34 INFO mapreduce.ImportJobBase: Beginning import of TB_RECHARGE_DIM_APPLICATION
18/01/10 14:27:34 INFO Configuration.deprecation: mapred.jar is deprecated. Instead, use mapreduce.job.jar
18/01/10 14:27:34 INFO manager.OracleManager: Time zone has been set to GMT
18/01/10 14:27:34 INFO Configuration.deprecation: mapred.map.tasks is deprecated. Instead, use mapreduce.job.maps
18/01/10 14:27:34 INFO hdfs.DFSClient: Created token for username: HDFS_DELEGATION_TOKEN owner=username@company.CO.ID, renewer=yarn, realUser=, issueDate=1515569254366, maxDate=1516174054366, sequenceNumber=29920785, masterKeyId=849 on ha-hdfs:nameservice1
18/01/10 14:27:34 INFO security.TokenCache: Got dt for hdfs://nameservice1; Kind: HDFS_DELEGATION_TOKEN, Service: ha-hdfs:nameservice1, Ident: (token for username: HDFS_DELEGATION_TOKEN owner=username@company.CO.ID, renewer=yarn, realUser=, issueDate=1515569254366, maxDate=1516174054366, sequenceNumber=29920785, masterKeyId=849)
18/01/10 14:28:10 WARN hdfs.DFSClient: Slow waitForAckedSeqno took 33367ms (threshold=30000ms). File being written: /user/username/.staging/job_1508590044386_4156415/libjars/commons-lang3-3.4.jar, block: BP-673686138-10.54.0.2-1453972538527:blk_3947617000_2874005894, Write pipeline datanodes: [DatanodeInfoWithStorage[10.54.1.110:50010,DS-bfb333fb-f63f-4c85-b60f-3ce0889fe16d,DISK], DatanodeInfoWithStorage[10.54.0.187:50010,DS-5c692f55-614c-4d33-9e83-0758d2d54555,DISK], DatanodeInfoWithStorage[10.54.0.183:50010,DS-8530593e-b498-455e-9aaa-b1a12c8ec3b2,DISK]]
18/01/10 14:28:13 INFO db.DBInputFormat: Using read commited transaction isolation
18/01/10 14:28:14 INFO mapreduce.JobSubmitter: number of splits:1
18/01/10 14:28:14 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1508590044386_4156415
18/01/10 14:28:14 INFO mapreduce.JobSubmitter: Kind: HDFS_DELEGATION_TOKEN, Service: ha-hdfs:nameservice1, Ident: (token for username: HDFS_DELEGATION_TOKEN owner=username@company.CO.ID, renewer=yarn, realUser=, issueDate=1515569254366, maxDate=1516174054366, sequenceNumber=29920785, masterKeyId=849)
18/01/10 14:28:15 INFO impl.YarnClientImpl: Submitted application application_1508590044386_4156415
18/01/10 14:28:15 INFO mapreduce.Job: The url to track the job: https://host:8090/proxy/application_1508590044386_4156415/
18/01/10 14:28:15 INFO mapreduce.Job: Running job: job_1508590044386_4156415
18/01/10 14:28:28 INFO mapreduce.Job: Job job_1508590044386_4156415 running in uber mode : false
18/01/10 14:28:28 INFO mapreduce.Job: map 0% reduce 0%
18/01/10 14:29:38 INFO mapreduce.Job: Task Id : attempt_1508590044386_4156415_m_000000_0, Status : FAILED
Error: java.lang.RuntimeException: java.lang.RuntimeException: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:170)
at org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:161)
at org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:73)
at org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:133)
at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:749)
at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1920)
at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
Caused by: java.lang.RuntimeException: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at org.apache.sqoop.mapreduce.db.DBInputFormat.getConnection(DBInputFormat.java:223)
at org.apache.sqoop.mapreduce.db.DBInputFormat.setDbConf(DBInputFormat.java:168)
... 10 more
Caused by: java.sql.SQLRecoverableException: IO Error: The Network Adapter could not establish the connection
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:673)
at oracle.jdbc.driver.PhysicalConnection.<init>(PhysicalConnection.java:715)
at oracle.jdbc.driver.T4CConnection.<init>(T4CConnection.java:385)
at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:30)
at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:564)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at org.apache.sqoop.mapreduce.db.DBConfiguration.getConnection(DBConfiguration.java:302)
at org.apache.sqoop.mapreduce.db.DBInputFormat.getConnection(DBInputFormat.java:216)
... 11 more
Caused by: oracle.net.ns.NetException: The Network Adapter could not establish the connection
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:445)
at oracle.net.resolver.AddrResolution.resolveAndExecute(AddrResolution.java:464)
at oracle.net.ns.NSProtocol.establishConnection(NSProtocol.java:594)
at oracle.net.ns.NSProtocol.connect(NSProtocol.java:229)
at oracle.jdbc.driver.T4CConnection.connect(T4CConnection.java:1360)
at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:486)
... 19 more
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at oracle.net.nt.TcpNTAdapter.connect(TcpNTAdapter.java:162)
at oracle.net.nt.ConnOption.connect(ConnOption.java:133)
at oracle.net.nt.ConnStrategy.execute(ConnStrategy.java:411)
... 24 more
我可以使用
列出表格sqoop list-tables --connect jdbc:oracle:thin:@//someExadataHost/dbInstance --username user --password pass
我不知道为什么网络无法建立连接但它成功启动了工作（这意味着sqoop能够连接并识别oracle表存在吗？）。地图任务从未完成..
对此有何看法？谢谢
答案 0 :(得分：0)
您遇到此问题可能有很多原因：
lsnrctl start命令或在Windows上启动监听器
服务。希望这会有所帮助!!
答案 1 :(得分：0)
在命令行中添加--driver oracle.jdbc.driver.OracleDriver。