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Posted to user@flink.apache.org by Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de> on 2015/04/12 21:33:46 UTC

Exception with Java Table API example

Hello all,

I've just tried the example of Java Table API as-is on the docs but I'm 
getting this exception:

/Exception in thread "main" java.lang.NoSuchMethodError: 
scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;//
//    at 
org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)//
//    at 
org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)//
//    at 
org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)//
//    at 
scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)//
//    at 
scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)//
//    at 
org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)//
//    at 
org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)//
//    at 
org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)//
//    at 
org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)//
//    at 
org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)//
//    at 
org.apache.flink.api.java.table.Ta//bleEnvironment.toTable(TableEnvironment.scala:57)/
/    at Main.main(Main.java:20)/

Line 20 is: /DataSet<WC> result = tableEnv.toSet(filtered, WC.class);

/What could be the reason firing the exception?/

/The version used is 0.9-hadoop1-SNAPSHOT/.

/Sincerely,
Mohamed/
/

Re: Exception with Java Table API example

Posted by Robert Metzger <rm...@apache.org>.
Hi,

looks like you are mixing regular flink dependencies with hadoop1
dependencies.
Can you replace

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table</artifactId>
            <version>0.9-hadoop1-SNAPSHOT</version>
            <type>jar</type>
        </dependency>

with

        <dependency>
            <groupId>org.apache.flink</groupId>
            <artifactId>flink-table</artifactId>
            <version>0.9-SNAPSHOT</version>
            <type>jar</type>
        </dependency>



On Mon, Apr 13, 2015 at 10:20 AM, Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>
wrote:

>  Here it is:
> https://gist.github.com/MohamedNadjibMAMI/6dedbea0b33c64928d6a
>
>
> On 13.04.2015 10:14, Robert Metzger wrote:
>
>  Can you post your pom.xml here: https://gist.github.com/ ?
>
>  You can also send it privately to me if you don't want to share it via
> the mailing list.
>
> On Mon, Apr 13, 2015 at 10:12 AM, Mohamed Nadjib MAMI <
> mami@iai.uni-bonn.de> wrote:
>
>>  Hello Robert,
>>
>> I'm not using Scala, no Scala dependency in my pom file.
>>
>> Thanks
>>
>>
>> On 13.04.2015 09:31, Robert Metzger wrote:
>>
>> Hi,
>>
>>  the error looks like a mixup of the Scala versions.
>> Are you adding any scala 2.11 dependencies in your pom?
>>
>>
>>
>> On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI <
>> mami@iai.uni-bonn.de> wrote:
>>
>>>  Hello,
>>>
>>> Suit to my previous email, apologize, the error was in: *Table table =
>>> tableEnv.toTable(input);*
>>>
>>> Cheers,
>>> Mohamed
>>>
>>>
>>> On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>>>
>>> Hello all,
>>>
>>> I've just tried the example of Java Table API as-is on the docs but I'm
>>> getting this exception:
>>>
>>> *Exception in thread "main" java.lang.NoSuchMethodError:
>>> scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;*
>>> *    at
>>> org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)*
>>> *    at
>>> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)*
>>> *    at
>>> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)*
>>> *    at
>>> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)*
>>> *    at
>>> scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)*
>>> *    at
>>> org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)*
>>> *    at
>>> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)*
>>> *    at
>>> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)*
>>> *    at
>>> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)*
>>> *    at
>>> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)*
>>> *    at org.apache.flink.api.java.table.Ta*
>>> *bleEnvironment.toTable(TableEnvironment.scala:57)*
>>> *    at Main.main(Main.java:20)*
>>>
>>> Line 20 is:
>>>
>>> *DataSet<WC> result = tableEnv.toSet(filtered, WC.class); *What could
>>> be the reason firing the exception?
>>>
>>> The version used is 0.9-hadoop1-SNAPSHOT
>>>
>>> *. *Sincerely,
>>> Mohamed
>>>
>>>
>>>
>>
>>
>
>

Re: Exception with Java Table API example

Posted by Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>.
Well, it worked, I replaced 0.9-hadoop1-SNAPSHOT by of0.9-SNAPSHOT.

On 13.04.2015 10:20, Mohamed Nadjib MAMI wrote:
> Here it is: https://gist.github.com/MohamedNadjibMAMI/6dedbea0b33c64928d6a
>
> On 13.04.2015 10:14, Robert Metzger wrote:
>> Can you post your pom.xml here: https://gist.github.com/ ?
>>
>> You can also send it privately to me if you don't want to share it 
>> via the mailing list.
>>
>> On Mon, Apr 13, 2015 at 10:12 AM, Mohamed Nadjib MAMI 
>> <mami@iai.uni-bonn.de <ma...@iai.uni-bonn.de>> wrote:
>>
>>     Hello Robert,
>>
>>     I'm not using Scala, no Scala dependency in my pom file.
>>
>>     Thanks
>>
>>
>>     On 13.04.2015 09:31, Robert Metzger wrote:
>>>     Hi,
>>>
>>>     the error looks like a mixup of the Scala versions.
>>>     Are you adding any scala 2.11 dependencies in your pom?
>>>
>>>
>>>
>>>     On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI
>>>     <mami@iai.uni-bonn.de <ma...@iai.uni-bonn.de>> wrote:
>>>
>>>         Hello,
>>>
>>>         Suit to my previous email, apologize, the error was in:
>>>         /Table table = tableEnv.toTable(input);/
>>>
>>>         Cheers,
>>>         Mohamed
>>>
>>>
>>>         On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>>>>         Hello all,
>>>>
>>>>         I've just tried the example of Java Table API as-is on the
>>>>         docs but I'm getting this exception:
>>>>
>>>>         /Exception in thread "main" java.lang.NoSuchMethodError:
>>>>         scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;//
>>>>         //    at
>>>>         org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)//
>>>>         //    at
>>>>         scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)//
>>>>         //    at
>>>>         scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)//
>>>>         //    at
>>>>         org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)//
>>>>         //    at
>>>>         org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)//
>>>>         //    at
>>>>         org.apache.flink.api.java.table.Ta//bleEnvironment.toTable(TableEnvironment.scala:57)/
>>>>         /    at Main.main(Main.java:20)/
>>>>
>>>>         Line 20 is: /DataSet<WC> result = tableEnv.toSet(filtered,
>>>>         WC.class);
>>>>
>>>>         /What could be the reason firing the exception?/
>>>>
>>>>         /The version used is 0.9-hadoop1-SNAPSHOT/.
>>>>
>>>>         /Sincerely,
>>>>         Mohamed/
>>>>         / 
>>>
>>>
>>
>>
>


Re: Exception with Java Table API example

Posted by Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>.
Here it is: https://gist.github.com/MohamedNadjibMAMI/6dedbea0b33c64928d6a

On 13.04.2015 10:14, Robert Metzger wrote:
> Can you post your pom.xml here: https://gist.github.com/ ?
>
> You can also send it privately to me if you don't want to share it via 
> the mailing list.
>
> On Mon, Apr 13, 2015 at 10:12 AM, Mohamed Nadjib MAMI 
> <mami@iai.uni-bonn.de <ma...@iai.uni-bonn.de>> wrote:
>
>     Hello Robert,
>
>     I'm not using Scala, no Scala dependency in my pom file.
>
>     Thanks
>
>
>     On 13.04.2015 09:31, Robert Metzger wrote:
>>     Hi,
>>
>>     the error looks like a mixup of the Scala versions.
>>     Are you adding any scala 2.11 dependencies in your pom?
>>
>>
>>
>>     On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI
>>     <mami@iai.uni-bonn.de <ma...@iai.uni-bonn.de>> wrote:
>>
>>         Hello,
>>
>>         Suit to my previous email, apologize, the error was in:
>>         /Table table = tableEnv.toTable(input);/
>>
>>         Cheers,
>>         Mohamed
>>
>>
>>         On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>>>         Hello all,
>>>
>>>         I've just tried the example of Java Table API as-is on the
>>>         docs but I'm getting this exception:
>>>
>>>         /Exception in thread "main" java.lang.NoSuchMethodError:
>>>         scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;//
>>>         //    at
>>>         org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)//
>>>         //    at
>>>         org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)//
>>>         //    at
>>>         org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)//
>>>         //    at
>>>         scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)//
>>>         //    at
>>>         scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)//
>>>         //    at
>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)//
>>>         //    at
>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)//
>>>         //    at
>>>         org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)//
>>>         //    at
>>>         org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)//
>>>         //    at
>>>         org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)//
>>>         //    at
>>>         org.apache.flink.api.java.table.Ta//bleEnvironment.toTable(TableEnvironment.scala:57)/
>>>         /    at Main.main(Main.java:20)/
>>>
>>>         Line 20 is: /DataSet<WC> result = tableEnv.toSet(filtered,
>>>         WC.class);
>>>
>>>         /What could be the reason firing the exception?/
>>>
>>>         /The version used is 0.9-hadoop1-SNAPSHOT/.
>>>
>>>         /Sincerely,
>>>         Mohamed/
>>>         / 
>>
>>
>
>


Re: Exception with Java Table API example

Posted by Robert Metzger <rm...@apache.org>.
Can you post your pom.xml here: https://gist.github.com/ ?

You can also send it privately to me if you don't want to share it via the
mailing list.

On Mon, Apr 13, 2015 at 10:12 AM, Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>
wrote:

>  Hello Robert,
>
> I'm not using Scala, no Scala dependency in my pom file.
>
> Thanks
>
>
> On 13.04.2015 09:31, Robert Metzger wrote:
>
> Hi,
>
>  the error looks like a mixup of the Scala versions.
> Are you adding any scala 2.11 dependencies in your pom?
>
>
>
> On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI <mami@iai.uni-bonn.de
> > wrote:
>
>>  Hello,
>>
>> Suit to my previous email, apologize, the error was in: *Table table =
>> tableEnv.toTable(input);*
>>
>> Cheers,
>> Mohamed
>>
>>
>> On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>>
>> Hello all,
>>
>> I've just tried the example of Java Table API as-is on the docs but I'm
>> getting this exception:
>>
>> *Exception in thread "main" java.lang.NoSuchMethodError:
>> scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;*
>> *    at
>> org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)*
>> *    at
>> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)*
>> *    at
>> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)*
>> *    at
>> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)*
>> *    at
>> scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)*
>> *    at
>> org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)*
>> *    at
>> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)*
>> *    at
>> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)*
>> *    at
>> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)*
>> *    at
>> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)*
>> *    at org.apache.flink.api.java.table.Ta*
>> *bleEnvironment.toTable(TableEnvironment.scala:57)*
>> *    at Main.main(Main.java:20)*
>>
>> Line 20 is:
>>
>> *DataSet<WC> result = tableEnv.toSet(filtered, WC.class); *What could be
>> the reason firing the exception?
>>
>> The version used is 0.9-hadoop1-SNAPSHOT
>>
>> *. *Sincerely,
>> Mohamed
>>
>>
>>
>
>

Re: Exception with Java Table API example

Posted by Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>.
Hello Robert,

I'm not using Scala, no Scala dependency in my pom file.

Thanks

On 13.04.2015 09:31, Robert Metzger wrote:
> Hi,
>
> the error looks like a mixup of the Scala versions.
> Are you adding any scala 2.11 dependencies in your pom?
>
>
>
> On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI 
> <mami@iai.uni-bonn.de <ma...@iai.uni-bonn.de>> wrote:
>
>     Hello,
>
>     Suit to my previous email, apologize, the error was in: /Table
>     table = tableEnv.toTable(input);/
>
>     Cheers,
>     Mohamed
>
>
>     On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>>     Hello all,
>>
>>     I've just tried the example of Java Table API as-is on the docs
>>     but I'm getting this exception:
>>
>>     /Exception in thread "main" java.lang.NoSuchMethodError:
>>     scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;//
>>     //    at
>>     org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)//
>>     //    at
>>     org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)//
>>     //    at
>>     org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)//
>>     //    at
>>     scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)//
>>     //    at
>>     scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)//
>>     //    at
>>     org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)//
>>     //    at
>>     org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)//
>>     //    at
>>     org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)//
>>     //    at
>>     org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)//
>>     //    at
>>     org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)//
>>     //    at
>>     org.apache.flink.api.java.table.Ta//bleEnvironment.toTable(TableEnvironment.scala:57)/
>>     /    at Main.main(Main.java:20)/
>>
>>     Line 20 is: /DataSet<WC> result = tableEnv.toSet(filtered, WC.class);
>>
>>     /What could be the reason firing the exception?/
>>
>>     /The version used is 0.9-hadoop1-SNAPSHOT/.
>>
>>     /Sincerely,
>>     Mohamed/
>>     / 
>
>


Re: Exception with Java Table API example

Posted by Robert Metzger <rm...@apache.org>.
Hi,

the error looks like a mixup of the Scala versions.
Are you adding any scala 2.11 dependencies in your pom?



On Sun, Apr 12, 2015 at 9:35 PM, Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>
wrote:

>  Hello,
>
> Suit to my previous email, apologize, the error was in: *Table table =
> tableEnv.toTable(input);*
>
> Cheers,
> Mohamed
>
>
> On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
>
> Hello all,
>
> I've just tried the example of Java Table API as-is on the docs but I'm
> getting this exception:
>
> *Exception in thread "main" java.lang.NoSuchMethodError:
> scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;*
> *    at
> org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)*
> *    at
> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)*
> *    at
> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)*
> *    at
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)*
> *    at
> scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)*
> *    at
> org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)*
> *    at
> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)*
> *    at
> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)*
> *    at
> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)*
> *    at
> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)*
> *    at org.apache.flink.api.java.table.Ta*
> *bleEnvironment.toTable(TableEnvironment.scala:57)*
> *    at Main.main(Main.java:20)*
>
> Line 20 is:
>
> *DataSet<WC> result = tableEnv.toSet(filtered, WC.class); *What could be
> the reason firing the exception?
>
> The version used is 0.9-hadoop1-SNAPSHOT
>
> *. *Sincerely,
> Mohamed
>
>
>

Re: Exception with Java Table API example

Posted by Mohamed Nadjib MAMI <ma...@iai.uni-bonn.de>.
Hello,

Suit to my previous email, apologize, the error was in: /Table table = 
tableEnv.toTable(input);/

Cheers,
Mohamed

On 12.04.2015 21:33, Mohamed Nadjib MAMI wrote:
> Hello all,
>
> I've just tried the example of Java Table API as-is on the docs but 
> I'm getting this exception:
>
> /Exception in thread "main" java.lang.NoSuchMethodError: 
> scala.runtime.BooleanRef.create(Z)Lscala/runtime/BooleanRef;//
> //    at 
> org.apache.flink.api.table.trees.TreeNode.exists(TreeNode.scala:93)//
> //    at 
> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:265)//
> //    at 
> org.apache.flink.api.java.table.JavaBatchTranslator$$anonfun$createSelect$1.apply(JavaBatchTranslator.scala:264)//
> //    at 
> scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)//
> //    at 
> scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)//
> //    at 
> org.apache.flink.api.java.table.JavaBatchTranslator.createSelect(JavaBatchTranslator.scala:263)//
> //    at 
> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:52)//
> //    at 
> org.apache.flink.api.java.table.JavaBatchTranslator.createTable(JavaBatchTranslator.scala:42)//
> //    at 
> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:152)//
> //    at 
> org.apache.flink.api.table.plan.PlanTranslator.createTable(PlanTranslator.scala:64)//
> //    at 
> org.apache.flink.api.java.table.Ta//bleEnvironment.toTable(TableEnvironment.scala:57)/
> /    at Main.main(Main.java:20)/
>
> Line 20 is: /DataSet<WC> result = tableEnv.toSet(filtered, WC.class);
>
> /What could be the reason firing the exception?/
>
> /The version used is 0.9-hadoop1-SNAPSHOT/.
>
> /Sincerely,
> Mohamed/
> /