Hello,

I am trying to install sqoop on EMR instance (Hadoop 1.0.3), I tried to
compile it from source (1.4.2) but I am getting this error:

*Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
class org.apache.hadoop.mapreduce.JobContext, but interface was expected*

I did as the FAQ page (https://cwiki.apache.org/confluence/display/SQOOP/FAQ)
but still with the same error.

I tried to use another versions and all with the same error.

the only tutorial I was able to fine was this:
http://blog.kylemulka.com/2012/04/how-to-install-sqoop-on-amazon-elastic-map-reduce-emr/
but as I said I am not using S3 and I need to run it on the same server.
Any suggestion how to install it on Amazon EMR?

Thanks.

--
Ibrahim

Hi Ibrahim,
how did you compiled the Sqoop? Would you mind trying the following command?

ant clean package -Dhadoopversion=100

* clean - remove any previous compilation outputs, this is to ensure that there are not left any files compiled for different Hadoop version
* package - compile and create package in build/ directory
* -Dhadopversion=100 compile all files for Hadoop 1.0.x

Jarcec

On Mon, Jan 14, 2013 at 06:38:36PM +0300, Ibrahim Yakti wrote:
> Hello,
>
> I am trying to install sqoop on EMR instance (Hadoop 1.0.3), I tried to
> compile it from source (1.4.2) but I am getting this error:
>
> *Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
> class org.apache.hadoop.mapreduce.JobContext, but interface was expected*
>
> I did as the FAQ page (https://cwiki.apache.org/confluence/display/SQOOP/FAQ)
> but still with the same error.
>
> I tried to use another versions and all with the same error.
>
> the only tutorial I was able to fine was this:
> http://blog.kylemulka.com/2012/04/how-to-install-sqoop-on-amazon-elastic-map-reduce-emr/
> but as I said I am not using S3 and I need to run it on the same server.
>
>
> Any suggestion how to install it on Amazon EMR?
>
> Thanks.
>
> --
> Ibrahim

Hello Jarek,

I have tried that and I got the following error:

13/01/15 09:49:17 INFO mapred.JobClient: Task Id :
attempt_201212160928_0044_m_000000_0, Status : FAILED
java.lang.RuntimeException: java.lang.RuntimeException:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure

The last packet sent successfully to the server was 0 milliseconds ago. The
driver has not received any packets from the server.
        at
org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:167)
        at
org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
        at
org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:730)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:375)
        at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132)
        at org.apache.hadoop.mapred.Child.main(Child.java:249)
Caused by: java.lang.RuntimeException:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
link failure

when I checked the processlist on the MySQL server I got the following:

>      Id: 10006
>    User: DB_USER
>    Host: DB_HOST
>      db: DB
> Command: Sleep
>    Time: 10
>   State:
>    Info: NULL
I have removed all the old sqoop files and downloaded a fresh one, I used
"ant clean package -Dhadoopversion=100"

moreover I have tried to compile it with -Dhadoopversion=20 &
-Dhadoopversion=23 ... still getting errors with no success.

--
Ibrahim
On Tue, Jan 15, 2013 at 9:07 AM, Jarek Jarcec Cecho <[EMAIL PROTECTED]>wrote:

> Hi Ibrahim,
> how did you compiled the Sqoop? Would you mind trying the following
> command?
>
> ant clean package -Dhadoopversion=100
>
> * clean - remove any previous compilation outputs, this is to ensure that
> there are not left any files compiled for different Hadoop version
> * package - compile and create package in build/ directory
> * -Dhadopversion=100 compile all files for Hadoop 1.0.x
>
> Jarcec
>
> On Mon, Jan 14, 2013 at 06:38:36PM +0300, Ibrahim Yakti wrote:
> > Hello,
> >
> > I am trying to install sqoop on EMR instance (Hadoop 1.0.3), I tried to
> > compile it from source (1.4.2) but I am getting this error:
> >
> > *Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
> > class org.apache.hadoop.mapreduce.JobContext, but interface was expected*
> >
> > I did as the FAQ page (
> https://cwiki.apache.org/confluence/display/SQOOP/FAQ)
> > but still with the same error.
> >
> > I tried to use another versions and all with the same error.
> >
> > the only tutorial I was able to fine was this:
> >
> http://blog.kylemulka.com/2012/04/how-to-install-sqoop-on-amazon-elastic-map-reduce-emr/
> > but as I said I am not using S3 and I need to run it on the same server.
> >
> >
> > Any suggestion how to install it on Amazon EMR?
> >
> > Thanks.
> >
> > --
> > Ibrahim
>

Hi Ibrahim,
based on your current exception it seems that you correctly resolved previous exception about Hadoop incompatibility.

> java.lang.RuntimeException: java.lang.RuntimeException:
> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> link failure

This exception is raised when MySQL JDBC driver can't create connection to your MySQL box. Sqoop requires direct access to your MySQL box not only from node where you're executing Sqoop, but also from all TaskTracker nodes in your cluster. Would you mind checking that you can connect to your MySQL box from all nodes? I would start by checking if the user on MySQL side is correctly defined. Additional information can be found in Sqoop troubleshooting guide [1].

Jarcec

Links:
1: http://sqoop.apache.org/docs/1.4.2/SqoopUserGuide.html#_mysql_connection_failure

On Tue, Jan 15, 2013 at 01:27:14PM +0300, Ibrahim Yakti wrote:
> Hello Jarek,
>
> I have tried that and I got the following error:
>
> 13/01/15 09:49:17 INFO mapred.JobClient: Task Id :
> attempt_201212160928_0044_m_000000_0, Status : FAILED
> java.lang.RuntimeException: java.lang.RuntimeException:
> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> link failure
>
> The last packet sent successfully to the server was 0 milliseconds ago. The
> driver has not received any packets from the server.
>         at
> org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:167)
>         at
> org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
>         at
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
>         at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:730)
>         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:375)
>         at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132)
>         at org.apache.hadoop.mapred.Child.main(Child.java:249)
> Caused by: java.lang.RuntimeException:
> com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> link failure
>
>
>
> when I checked the processlist on the MySQL server I got the following:
>
> >      Id: 10006
> >    User: DB_USER
> >    Host: DB_HOST
> >      db: DB
> > Command: Sleep
> >    Time: 10
> >   State:
> >    Info: NULL
>
>
>
>
> I have removed all the old sqoop files and downloaded a fresh one, I used
> "ant clean package -Dhadoopversion=100"
>
> moreover I have tried to compile it with -Dhadoopversion=20 &
> -Dhadoopversion=23 ... still getting errors with no success.
>
>
>
> --
> Ibrahim
>
>
> On Tue, Jan 15, 2013 at 9:07 AM, Jarek Jarcec Cecho <[EMAIL PROTECTED]>wrote:
>
> > Hi Ibrahim,
> > how did you compiled the Sqoop? Would you mind trying the following
> > command?
> >
> > ant clean package -Dhadoopversion=100
> >
> > * clean - remove any previous compilation outputs, this is to ensure that
> > there are not left any files compiled for different Hadoop version
> > * package - compile and create package in build/ directory
> > * -Dhadopversion=100 compile all files for Hadoop 1.0.x
> >
> > Jarcec
> >
> > On Mon, Jan 14, 2013 at 06:38:36PM +0300, Ibrahim Yakti wrote:
> > > Hello,
> > >
> > > I am trying to install sqoop on EMR instance (Hadoop 1.0.3), I tried to
> > > compile it from source (1.4.2) but I am getting this error:
> > >
> > > *Exception in thread "main" java.lang.IncompatibleClassChangeError: Found
> > > class org.apache.hadoop.mapreduce.JobContext, but interface was expected*
> > >
> > > I did as the FAQ page (
> > https://cwiki.apache.org/confluence/display/SQOOP/FAQ)
> > > but still with the same error.
> > >
> > > I tried to use another versions and all with the same error.
> > >
> > > the only tutorial I was able to fine was this:
> > >
> > http://blog.kylemulka.com/2012/04/how-to-install-sqoop-on-amazon-elastic-map-reduce-emr/

Thanks Jarec, seems it was a permission issue of one of the trackers, I
have granted access to % on the mysql server and it worked like a charm.

Although I am working on a single node EMR but it seems it uses more than
one IP because part of it is connecting while other IPs are timed out.

Thanks.
--
Ibrahim
On Tue, Jan 15, 2013 at 1:41 PM, Jarek Jarcec Cecho <[EMAIL PROTECTED]>wrote:

> Hi Ibrahim,
> based on your current exception it seems that you correctly resolved
> previous exception about Hadoop incompatibility.
>
> > java.lang.RuntimeException: java.lang.RuntimeException:
> > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> > link failure
>
> This exception is raised when MySQL JDBC driver can't create connection to
> your MySQL box. Sqoop requires direct access to your MySQL box not only
> from node where you're executing Sqoop, but also from all TaskTracker nodes
> in your cluster. Would you mind checking that you can connect to your MySQL
> box from all nodes? I would start by checking if the user on MySQL side is
> correctly defined. Additional information can be found in Sqoop
> troubleshooting guide [1].
>
> Jarcec
>
> Links:
> 1:
> http://sqoop.apache.org/docs/1.4.2/SqoopUserGuide.html#_mysql_connection_failure
>
> On Tue, Jan 15, 2013 at 01:27:14PM +0300, Ibrahim Yakti wrote:
> > Hello Jarek,
> >
> > I have tried that and I got the following error:
> >
> > 13/01/15 09:49:17 INFO mapred.JobClient: Task Id :
> > attempt_201212160928_0044_m_000000_0, Status : FAILED
> > java.lang.RuntimeException: java.lang.RuntimeException:
> > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> > link failure
> >
> > The last packet sent successfully to the server was 0 milliseconds ago.
> The
> > driver has not received any packets from the server.
> >         at
> >
> org.apache.sqoop.mapreduce.db.DBInputFormat.setConf(DBInputFormat.java:167)
> >         at
> > org.apache.hadoop.util.ReflectionUtils.setConf(ReflectionUtils.java:62)
> >         at
> >
> org.apache.hadoop.util.ReflectionUtils.newInstance(ReflectionUtils.java:117)
> >         at
> org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:730)
> >         at org.apache.hadoop.mapred.MapTask.run(MapTask.java:375)
> >         at org.apache.hadoop.mapred.Child$4.run(Child.java:255)
> >         at java.security.AccessController.doPrivileged(Native Method)
> >         at javax.security.auth.Subject.doAs(Subject.java:396)
> >         at
> >
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1132)
> >         at org.apache.hadoop.mapred.Child.main(Child.java:249)
> > Caused by: java.lang.RuntimeException:
> > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications
> > link failure
> >
> >
> >
> > when I checked the processlist on the MySQL server I got the following:
> >
> > >      Id: 10006
> > >    User: DB_USER
> > >    Host: DB_HOST
> > >      db: DB
> > > Command: Sleep
> > >    Time: 10
> > >   State:
> > >    Info: NULL
> >
> >
> >
> >
> > I have removed all the old sqoop files and downloaded a fresh one, I used
> > "ant clean package -Dhadoopversion=100"
> >
> > moreover I have tried to compile it with -Dhadoopversion=20 &
> > -Dhadoopversion=23 ... still getting errors with no success.
> >
> >
> >
> > --
> > Ibrahim
> >
> >
> > On Tue, Jan 15, 2013 at 9:07 AM, Jarek Jarcec Cecho <[EMAIL PROTECTED]
> >wrote:
> >
> > > Hi Ibrahim,
> > > how did you compiled the Sqoop? Would you mind trying the following
> > > command?
> > >
> > > ant clean package -Dhadoopversion=100
> > >
> > > * clean - remove any previous compilation outputs, this is to ensure
> that
> > > there are not left any files compiled for different Hadoop version
> > > * package - compile and create package in build/ directory
> > > * -Dhadopversion=100 compile all files for Hadoop 1.0.x
> > >
> > > Jarcec
> > >
> > > On Mon, Jan 14, 2013 at 06:38:36PM +0300, Ibrahim Yakti wrote:
> > > > Hello,
> > > >
>