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  1. Sqoop (Retired)
  2. SQOOP-3139

sqoop tries to re execute select query during import in case of a connection reset error and this is causing lots of duplicate records from source

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 1.4.6
    • 1.5.0
    • None
    • None

    • IBM Hadoop distribution: 4.2.0
      version: 1.4.6_IBM_27
      Sqoop 1.4.6_IBM_27

    Description

      We cannot reproduce this issue as it depends on network. Here is a edited log content for understanding the issue.

      Log start
      .
      .
      2017-02-22 07:35:37,638 INFO [main] org.apache.sqoop.mapreduce.sqlserver.SqlServerRecordReader: Using query: select sequence_number, analytical_bundle_masked where ( Sequence_Number >= 8571429 ) AND ( Sequence_Number <= 10000000 )
      2017-02-22 07:35:37,662 INFO [main] org.apache.sqoop.mapreduce.db.DBRecordReader: Executing query: select sequence_number, analytical_bundle_masked where ( Sequence_Number >= 8571429 ) AND ( Sequence_Number <= 10000000 )
      2017-02-22 07:39:00,533 ERROR [main] org.apache.sqoop.mapreduce.db.DBRecordReader: Top level exception:
      com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset
      at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2399)
      at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2383)
      at com.microsoft.sqlserver.jdbc.TDSChannel.read(IOBuffer.java:1884)
      at com.microsoft.sqlserver.jdbc.TDSReader.readPacket(IOBuffer.java:6685)
      at com.microsoft.sqlserver.jdbc.TDSReader.nextPacket(IOBuffer.java:6595)
      at com.microsoft.sqlserver.jdbc.TDSReader.ensurePayload(IOBuffer.java:6571)
      at com.microsoft.sqlserver.jdbc.TDSReader.readBytes(IOBuffer.java:6864)
      at com.microsoft.sqlserver.jdbc.TDSReader.readWrappedBytes(IOBuffer.java:6886)
      at com.microsoft.sqlserver.jdbc.TDSReader.readUnsignedShort(IOBuffer.java:6801)
      at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValuePrep(dtv.java:3570)
      at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValue(dtv.java:3936)
      at com.microsoft.sqlserver.jdbc.DTV.getValue(dtv.java:226)
      at com.microsoft.sqlserver.jdbc.Column.getValue(Column.java:144)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:2099)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:2084)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getString(SQLServerResultSet.java:2427)
      at org.apache.sqoop.lib.JdbcWritableBridge.readString(JdbcWritableBridge.java:71)
      at com.cloudera.sqoop.lib.JdbcWritableBridge.readString(JdbcWritableBridge.java:61)
      at QueryResult.readFields0(QueryResult.java:10706)
      at QueryResult.readFields(QueryResult.java:10415)
      at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:244)
      at org.apache.sqoop.mapreduce.db.SQLServerDBRecordReader.nextKeyValue(SQLServerDBRecordReader.java:148)
      at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556)
      at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
      at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
      at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
      at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
      at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
      at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
      at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164)
      at java.security.AccessController.doPrivileged(Native Method)
      at javax.security.auth.Subject.doAs(Subject.java:422)
      at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
      at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
      2017-02-22 07:39:00,552 WARN [main] org.apache.sqoop.mapreduce.db.SQLServerDBRecordReader: Trying to recover from DB read failure:
      java.io.IOException: SQLException in nextKeyValue
      at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:277)
      at org.apache.sqoop.mapreduce.db.SQLServerDBRecordReader.nextKeyValue(SQLServerDBRecordReader.java:148)
      at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556)
      at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80)
      at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91)
      at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)
      at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64)
      at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
      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:1657)
      at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)
      Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Connection reset
      at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2399)
      at com.microsoft.sqlserver.jdbc.SQLServerConnection.terminate(SQLServerConnection.java:2383)
      at com.microsoft.sqlserver.jdbc.TDSChannel.read(IOBuffer.java:1884)
      at com.microsoft.sqlserver.jdbc.TDSReader.readPacket(IOBuffer.java:6685)
      at com.microsoft.sqlserver.jdbc.TDSReader.nextPacket(IOBuffer.java:6595)
      at com.microsoft.sqlserver.jdbc.TDSReader.ensurePayload(IOBuffer.java:6571)
      at com.microsoft.sqlserver.jdbc.TDSReader.readBytes(IOBuffer.java:6864)
      at com.microsoft.sqlserver.jdbc.TDSReader.readWrappedBytes(IOBuffer.java:6886)
      at com.microsoft.sqlserver.jdbc.TDSReader.readUnsignedShort(IOBuffer.java:6801)
      at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValuePrep(dtv.java:3570)
      at com.microsoft.sqlserver.jdbc.ServerDTVImpl.getValue(dtv.java:3936)
      at com.microsoft.sqlserver.jdbc.DTV.getValue(dtv.java:226)
      at com.microsoft.sqlserver.jdbc.Column.getValue(Column.java:144)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:2099)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getValue(SQLServerResultSet.java:2084)
      at com.microsoft.sqlserver.jdbc.SQLServerResultSet.getString(SQLServerResultSet.java:2427)
      at org.apache.sqoop.lib.JdbcWritableBridge.readString(JdbcWritableBridge.java:71)
      at com.cloudera.sqoop.lib.JdbcWritableBridge.readString(JdbcWritableBridge.java:61)
      at QueryResult.readFields0(QueryResult.java:10706)
      at QueryResult.readFields(QueryResult.java:10415)
      at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:244)
      ... 13 more
      .
      .
      2017-02-22 07:39:00,928 INFO [main] org.apache.sqoop.mapreduce.sqlserver.SqlServerRecordReader: Using query: select sequence_number, analytical_bundle_masked where ( Sequence_Number >= 8571429 ) AND ( Sequence_Number <= 10000000 )
      2017-02-22 07:39:00,929 INFO [main] org.apache.sqoop.mapreduce.db.DBRecordReader: Executing query: select sequence_number, analytical_bundle_masked where ( Sequence_Number >= 8571429 ) AND ( Sequence_Number <= 10000000 )

      2017-02-22 08:05:03,199 INFO [Thread-15] org.apache.sqoop.mapreduce.AutoProgressMapper: Auto-progress thread is finished. keepGoing=false
      2017-02-22 08:05:03,295 INFO [main] org.apache.hadoop.mapred.Task: Task:attempt_1486732304049_0615_m_000006_0 is done. And is in the process of committing
      2017-02-22 08:05:03,344 INFO [main] org.apache.hadoop.mapred.Task: Task attempt_1486732304049_0615_m_000006_0 is allowed to commit now
      2017-02-22 08:05:03,350 INFO [main] org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter: Saved output of task 'attempt_1486732304049_0615_m_000006_0' to hdfs://ehaascluster/jcrew/hdfs/qa/secure/work/customer/experian/experian_jb_analytical_bundle/_temporary/1/task_1486732304049_0615_m_000006
      2017-02-22 08:05:03,390 INFO [main] org.apache.hadoop.mapred.Task: Task 'attempt_1486732304049_0615_m_000006_1' done.
      End of LogType:syslog

      Container: container_e58_1486732304049_0615_01_000005 on bi4c-11665-data-1.bi.services.bluemix.net_45454
      ==========================================================================================================
      LogType:stderr
      Log Upload Time:Wed Feb 22 08:07:25 +0000 2017
      LogLength:243
      Log Contents:
      log4j:WARN No appenders could be found for logger (org.apache.hadoop.metrics2.impl.MetricsSystemImpl).
      log4j:WARN Please initialize the log4j system properly.
      log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
      End of LogType:stderr

      LogType:stdout
      Log Upload Time:Wed Feb 22 08:07:25 +0000 2017
      LogLength:0
      Log Contents:
      End of LogType:stdout

      LogType:syslog
      Log Upload Time:Wed Feb 22 08:07:25 +0000 2017
      LogLength:104358

      Attachments

        1. SQOOP-3139.patch
          2 kB
          Anna Szonyi
        2. SQOOP-3139-3.patch
          11 kB
          Zoltán Tóth

        Issue Links

          depends upon

          Bug - A problem which impairs or prevents the functions of the product. SQOOP-3140 mapred.map.max.attempts is deprecated. Instead, use mapreduce.map.maxattempts - old property is used by SQOOP-2055

          • Major - Major loss of function.
          • Resolved
          relates to

          Bug - A problem which impairs or prevents the functions of the product. SQOOP-2055 Run only one map task attempt during export

          • Major - Major loss of function.
          • Resolved
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              Swank Zoltán Tóth
              hem1891 hemanth meka
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              Dates

                Created:
                Updated:
                Resolved: