Sqoop---Got exception in update thread: com.mysql.jd bc.exceptions.jdbc4.MySQLSyntaxErrorException

问题：通过sqoop将mysql中的数据导入到hdfs的时候，日志停留在map 100% reduce 0%不动。如下所示：

16/07/21 11:46:09 INFO mapreduce.Job: Job job_1469064014798_0012 running in uber mode : false
16/07/21 11:46:09 INFO mapreduce.Job:  map 0% reduce 0%
16/07/21 11:46:21 INFO mapreduce.Job:  map 100% reduce 0%
16/07/21 11:56:38 INFO mapreduce.Job: Task Id : attempt_1469064014798_0012_m_000000_0, Status : FAILED
AttemptID:attempt_1469064014798_0012_m_000000_0 Timed out after 600 secs
16/07/21 11:56:39 INFO mapreduce.Job:  map 0% reduce 0%
16/07/21 11:56:50 INFO mapreduce.Job:  map 100% reduce 0%
16/07/21 12:07:08 INFO mapreduce.Job: Task Id : attempt_1469064014798_0012_m_000000_1, Status : FAILED
AttemptID:attempt_1469064014798_0012_m_000000_1 Timed out after 600 secs
16/07/21 12:07:09 INFO mapreduce.Job:  map 0% reduce 0%
16/07/21 12:07:20 INFO mapreduce.Job:  map 100% reduce 0%
16/07/21 12:17:38 INFO mapreduce.Job: Task Id : attempt_1469064014798_0012_m_000000_2, Status : FAILED
AttemptID:attempt_1469064014798_0012_m_000000_2 Timed out after 600 secs
16/07/21 12:17:39 INFO mapreduce.Job:  map 0% reduce 0%
16/07/21 12:17:49 INFO mapreduce.Job:  map 100% reduce 0%

解决方案：
在NodeManager上面查看对应的job工作日志：

[root@hadoop44 container_1469064014798_0009_01_000002]# pwd
/usr/local/hadoop/logs/userlogs/application_1469064014798_0009/container_1469064014798_0009_01_000002
[root@hadoop44 container_1469064014798_0009_01_000002]# ll
total 4
-rw-r--r--. 1 root root 0 Jul 21 11:25 stderr
-rw-r--r--. 1 root root 0 Jul 21 11:25 stdout
-rw-r--r--. 1 root root 4028 Jul 21 11:26 syslog
[root@hadoop44 container_1469064014798_0009_01_000002]# more syslog
2016-07-21 11:25:58,030 WARN [main] org.apache.hadoop.conf.Configuration: job.xml:an attempt to override final parameter: mapreduce.job
.end-notification.max.retry.interval;  Ignoring.
2016-07-21 11:25:58,088 WARN [main] org.apache.hadoop.conf.Configuration: job.xml:an attempt to override final parameter: mapreduce.job
.end-notification.max.attempts;  Ignoring.
2016-07-21 11:25:58,460 INFO [main] org.apache.hadoop.metrics2.impl.MetricsConfig: loaded properties from hadoop-metrics2.properties
2016-07-21 11:25:58,526 INFO [main] org.apache.hadoop.metrics2.impl.MetricsSystemImpl: Scheduled snapshot period at 10 second(s).
2016-07-21 11:25:58,526 INFO [main] org.apache.hadoop.metrics2.impl.MetricsSystemImpl: MapTask metrics system started
2016-07-21 11:25:58,535 INFO [main] org.apache.hadoop.mapred.YarnChild: Executing with tokens:
2016-07-21 11:25:58,535 INFO [main] org.apache.hadoop.mapred.YarnChild: Kind: mapreduce.job, Service: job_1469064014798_0009, Ident: (o
rg.apache.hadoop.mapreduce.security.token.JobTokenIdentifier@597355e7)
2016-07-21 11:25:58,596 INFO [main] org.apache.hadoop.mapred.YarnChild: Sleeping for 0ms before retrying again. Got null now.
2016-07-21 11:25:58,904 INFO [main] org.apache.hadoop.mapred.YarnChild: mapreduce.cluster.local.dir for child: /usr/local/hadoop/tmp/nm
-local-dir/usercache/root/appcache/application_1469064014798_0009
2016-07-21 11:25:59,077 WARN [main] org.apache.hadoop.conf.Configuration: job.xml:an attempt to override final parameter: mapreduce.job
.end-notification.max.retry.interval;  Ignoring.
2016-07-21 11:25:59,096 WARN [main] org.apache.hadoop.conf.Configuration: job.xml:an attempt to override final parameter: mapreduce.job
.end-notification.max.attempts;  Ignoring.
2016-07-21 11:25:59,471 INFO [main] org.apache.hadoop.conf.Configuration.deprecation: session.id is deprecated. Instead, use dfs.metric
s.session-id
2016-07-21 11:25:59,941 INFO [main] org.apache.hadoop.mapred.Task:  Using ResourceCalculatorProcessTree : [ ]
2016-07-21 11:26:00,145 INFO [main] org.apache.hadoop.mapred.MapTask: Processing split: Paths:/dir1/consumer.txt:0+102
2016-07-21 11:26:00,149 INFO [main] org.apache.hadoop.conf.Configuration.deprecation: map.input.file is deprecated. Instead, use mapred
uce.map.input.file
2016-07-21 11:26:00,149 INFO [main] org.apache.hadoop.conf.Configuration.deprecation: map.input.start is deprecated. Instead, use mapre
duce.map.input.start
2016-07-21 11:26:00,149 INFO [main] org.apache.hadoop.conf.Configuration.deprecation: map.input.length is deprecated. Instead, use mapr
educe.map.input.length
2016-07-21 11:26:00,557 INFO [Thread-11] org.apache.sqoop.mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=fal
se
2016-07-21 11:26:00,613 ERROR [Thread-10] org.apache.sqoop.mapreduce.AsyncSqlOutputFormat: Got exception in update thread: com.mysql.jd
bc.exceptions.jdbc4.MySQLSyntaxErrorException: Table 'consumer.txt' doesn't exist
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
        at com.mysql.jdbc.Util.getInstance(Util.java:386)
        at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1054)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4237)
        at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4169)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2617)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2778)
        at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2825)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2156)
        at com.mysql.jdbc.PreparedStatement.execute(PreparedStatement.java:1379)
        at org.apache.sqoop.mapreduce.AsyncSqlOutputFormat$AsyncSqlExecThread.run(AsyncSqlOutputFormat.java:233)

从日志可以看出，mysql中的consumer.txt表不存在，但是问题来了，consumer.txt这个表在mysql数据库中是存在的，如下所示：

此时我感觉到可能是consumer.txt这个表的后缀名造成的，于是我将consumer.txt改为consumer试了试，问题解决。