Import fails with SocketTimeoutException (through duplicate key value) or ExceptionReport: null about sos-importer

[johnjohndoe]

With the help of @CarstenHollmann and the SOS server log level set to TRACE I found an BatchUpdateException and ... duplicate key value ... in /var/log/tomcat7/52n-sos-webapp.log:

ERROR [http-bio-8080-exec-15] [SqlExceptionHelper.java:146] 
  Batch entry 0 insert into ... was aborted.  Call getNextException to see the cause.
WARN [http-bio-8080-exec-15] [SqlExceptionHelper.java:144] SQL Error: 0, SQLState: 23505
ERROR [http-bio-8080-exec-15] [SqlExceptionHelper.java:146] 
  ERROR: duplicate key value violates unique constraint "observationidentity"
  Detail: Key (seriesid, phenomenontimestart, phenomenontimeend, resulttime)=
  (112, 2015-01-02 00:00:00, 2015-01-02 00:00:00, 2015-01-02 00:00:00) already exists.
ERROR [http-bio-8080-exec-15] [BatchingBatch.java:137] HHH000315: Exception executing batch [could not execute batch]
WARN [http-bio-8080-exec-15] [ExceptionLogger.java:73] Exception thrown
org.n52.sos.exception.ows.NoApplicableCodeException: Observation with same values already contained in database
    at org.n52.sos.ds.hibernate.InsertObservationDAO.checkContainsAndThrow(InsertObservationDAO.java:281) ~[hibernate-dao-4.3.0.jar:na]
    at org.n52.sos.ds.hibernate.InsertObservationDAO.insertObservation(InsertObservationDAO.java:239) ~[hibernate-dao-4.3.0.jar:na]
    at org.n52.sos.request.operator.SosInsertObservationOperatorV20.receive(SosInsertObservationOperatorV20.java:116) ~[transactional-v20-4.3.0.jar:na]
    at org.n52.sos.request.operator.SosInsertObservationOperatorV20.receive(SosInsertObservationOperatorV20.java:92) ~[transactional-v20-4.3.0.jar:na]
    ...

Caused by: org.hibernate.exception.ConstraintViolationException: could not execute batch
    at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:129) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ...
    at org.n52.sos.ds.hibernate.InsertObservationDAO.insertObservation(InsertObservationDAO.java:217) ~[hibernate-dao-4.3.0.jar:na]
    ... 64 common frames omitted

Caused by: java.sql.BatchUpdateException: Batch entry 0 insert into ... was aborted.  
Call getNextException to see the cause.
    at org.postgresql.jdbc2.AbstractJdbc2Statement$BatchResultHandler.handleError(AbstractJdbc2Statement.java:2740) ~[postgresql-9.3-1101-jdbc4.jar:na]
    at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1891) ~[postgresql-9.3-1101-jdbc4.jar:na]
    at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:405) ~[postgresql-9.3-1101-jdbc4.jar:na]
    at org.postgresql.jdbc2.AbstractJdbc2Statement.executeBatch(AbstractJdbc2Statement.java:2889) ~[postgresql-9.3-1101-jdbc4.jar:na]
    at com.mchange.v2.c3p0.impl.NewProxyPreparedStatement.executeBatch(NewProxyPreparedStatement.java:1135) ~[c3p0-0.9.2.1.jar:0.9.2.1]
    at org.hibernate.engine.jdbc.batch.internal.BatchingBatch.performExecution(BatchingBatch.java:123) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ... 77 common frames omitted

Looking at the sensordata.csv.52n-sos-import-config-0.5.xml we discovered that I was using the same identifier for multiple columns in the .csv file.

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I am going to create a new configuration file. Please decide if you want to use the above information to enhance the error output of the importer.