Stream sql query in Flink

[jiecxy]

Hi all,
  I want to write a program, a thread read the real-time message from /var/log/messages and write them to kafaka, and it works. Then I want to use sql of flink to query the messages, and the following are my code:

-----------------------------------------------------------------------------------------------------------

        // set up the execution environment
        final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
        env.setParallelism(2);

        StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);


        DataStream<String> text = env.addSource(new FlinkKafkaConsumer08<String>("test", new SimpleStringSchema(), properties));
        DataStream<Tuple4<Long, String, String, String>> messages =
                text.flatMap(new Tokenizer());
        tableEnv.registerDataStream("Syslogs", messages, "time, user, process, msg");

        Table result = tableEnv.sql(
                "SELECT STREAM msg FROM Syslogs WHERE msg LIKE '%system%'"
        );


        TableSink sink = new CsvTableSink("/home/jiecxy/Desktop/test.csv", "|");
        result.writeToSink(sink);

        // execute program
        env.execute();  
-----------------------------------------------------------------------------------------------------------
Note: the class Tokenizer is to transfer the log to four parts. Like this:
   Sep  6 09:28:01 master systemd: Stopping user-988.slice.
to
  Tuple4<time, master, systemd,  Stopping user-988.slice.>


But when I ran it use Flink:
  bin/flink run readlog.jar

I got the exception...  What should I do?


Starting execution of program

------------------------------------------------------------
 The program finished with the following exception:

org.apache.flink.client.program.ProgramInvocationException: The main method caused an error.
        at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:524)
        at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403)
        at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:331)
        at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:777)
        at org.apache.flink.client.CliFrontend.run(CliFrontend.java:253)
        at org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1005)
        at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1048)
Caused by: java.lang.RuntimeException: java.sql.SQLException: No suitable driver found for jdbc:calcite:
        at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:151)
        at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:106)
        at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:127)
        at org.apache.flink.api.table.FlinkRelBuilder$.create(FlinkRelBuilder.scala:56)
        at org.apache.flink.api.table.TableEnvironment.<init>(TableEnvironment.scala:73)
        at org.apache.flink.api.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:58)
        at org.apache.flink.api.java.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:45)
        at org.apache.flink.api.table.TableEnvironment$.getTableEnvironment(TableEnvironment.scala:376)
        at org.apache.flink.api.table.TableEnvironment.getTableEnvironment(TableEnvironment.scala)
        at org.myorg.quickstart.ReadingFromKafka2.main(ReadingFromKafka2.java:48)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:509)
        ... 6 more
Caused by: java.sql.SQLException: No suitable driver found for jdbc:calcite:
        at java.sql.DriverManager.getConnection(DriverManager.java:689)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:144)
        ... 20 more

[Timo Walther]

Hi,

this looks like a bug. I created an issue for it
(https://issues.apache.org/jira/browse/FLINK-4581). Could you also send
us the pom.xml you are using for your project?

Timo

Am 06/09/16 um 13:47 schrieb jiecxy:

> Hi all,
>    I want to write a program, a thread read the real-time message from
> /var/log/messages and write them to kafaka, and it works. Then I want to use
> sql of flink to query the messages, and the following are my code:
>
> -----------------------------------------------------------------------------------------------------------
>
>          // set up the execution environment
>          final StreamExecutionEnvironment env =
> StreamExecutionEnvironment.getExecutionEnvironment();
>          env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
>          env.setParallelism(2);
>
>          StreamTableEnvironment tableEnv =
> TableEnvironment.getTableEnvironment(env);
>
>
>          DataStream<String> text = env.addSource(new
> FlinkKafkaConsumer08<String>("test", new SimpleStringSchema(), properties));
>          DataStream<Tuple4&lt;Long, String, String, String>> messages =
>                  text.flatMap(new Tokenizer());
>          tableEnv.registerDataStream("Syslogs", messages, "time, user,
> process, msg");
>
>          Table result = tableEnv.sql(
>                  "SELECT STREAM msg FROM Syslogs WHERE msg LIKE '%system%'"
>          );
>
>
>          TableSink sink = new CsvTableSink("/home/jiecxy/Desktop/test.csv",
> "|");
>          result.writeToSink(sink);
>
>          // execute program
>          env.execute();
> -----------------------------------------------------------------------------------------------------------
> Note: the class Tokenizer is to transfer the log to four parts. Like this:
>     Sep  6 09:28:01 master systemd: Stopping user-988.slice.
> to
>    Tuple4<time, master, systemd,  Stopping user-988.slice.>
>
>
> But when I ran it use Flink:
>    bin/flink run readlog.jar
>
> I got the exception...  What should I do?
>
>
> Starting execution of program
>
> ------------------------------------------------------------
>   The program finished with the following exception:
>
> org.apache.flink.client.program.ProgramInvocationException: The main method
> caused an error.
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:524)
> at
> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403)
> at
> org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:331)
> at org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:777)
> at org.apache.flink.client.CliFrontend.run(CliFrontend.java:253)
> at
> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1005)
> at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1048)
> Caused by: java.lang.RuntimeException: java.sql.SQLException: No suitable
> driver found for jdbc:calcite:
> at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:151)
> at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:106)
> at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:127)
> at
> org.apache.flink.api.table.FlinkRelBuilder$.create(FlinkRelBuilder.scala:56)
> at
> org.apache.flink.api.table.TableEnvironment.<init>(TableEnvironment.scala:73)
> at
> org.apache.flink.api.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:58)
> at
> org.apache.flink.api.java.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:45)
> at
> org.apache.flink.api.table.TableEnvironment$.getTableEnvironment(TableEnvironment.scala:376)
> at
> org.apache.flink.api.table.TableEnvironment.getTableEnvironment(TableEnvironment.scala)
> at org.myorg.quickstart.ReadingFromKafka2.main(ReadingFromKafka2.java:48)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at
> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:509)
> ... 6 more
> Caused by: java.sql.SQLException: No suitable driver found for jdbc:calcite:
> at java.sql.DriverManager.getConnection(DriverManager.java:689)
> at java.sql.DriverManager.getConnection(DriverManager.java:208)
> at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:144)
> ... 20 more
>
>
>
>
> --
> View this message in context: http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Stream-sql-query-in-Flink-tp8928.html
> Sent from the Apache Flink User Mailing List archive. mailing list archive at Nabble.com.

--
Freundliche Grüße / Kind Regards

Timo Walther

Follow me: @twalthr
https://www.linkedin.com/in/twalthr

[Timo Walther]

I have opened a PR which should solve your problem. Would be great if
you could test it.

https://github.com/apache/flink/pull/2506

Timo

Am 06/09/16 um 14:31 schrieb Timo Walther:

> Hi,
>
> this looks like a bug. I created an issue for it
> (https://issues.apache.org/jira/browse/FLINK-4581). Could you also
> send us the pom.xml you are using for your project?
>
> Timo
>
> Am 06/09/16 um 13:47 schrieb jiecxy:
>> Hi all,
>>    I want to write a program, a thread read the real-time message from
>> /var/log/messages and write them to kafaka, and it works. Then I want
>> to use
>> sql of flink to query the messages, and the following are my code:
>>
>> -----------------------------------------------------------------------------------------------------------
>>
>>
>>          // set up the execution environment
>>          final StreamExecutionEnvironment env =
>> StreamExecutionEnvironment.getExecutionEnvironment();
>> env.setStreamTimeCharacteristic(TimeCharacteristic.EventTime);
>>          env.setParallelism(2);
>>
>>          StreamTableEnvironment tableEnv =
>> TableEnvironment.getTableEnvironment(env);
>>
>>
>>          DataStream<String> text = env.addSource(new
>> FlinkKafkaConsumer08<String>("test", new SimpleStringSchema(),
>> properties));
>>          DataStream<Tuple4&lt;Long, String, String, String>> messages =
>>                  text.flatMap(new Tokenizer());
>>          tableEnv.registerDataStream("Syslogs", messages, "time, user,
>> process, msg");
>>
>>          Table result = tableEnv.sql(
>>                  "SELECT STREAM msg FROM Syslogs WHERE msg LIKE
>> '%system%'"
>>          );
>>
>>
>>          TableSink sink = new
>> CsvTableSink("/home/jiecxy/Desktop/test.csv",
>> "|");
>>          result.writeToSink(sink);
>>
>>          // execute program
>>          env.execute();
>> -----------------------------------------------------------------------------------------------------------
>>
>> Note: the class Tokenizer is to transfer the log to four parts. Like
>> this:
>>     Sep  6 09:28:01 master systemd: Stopping user-988.slice.
>> to
>>    Tuple4<time, master, systemd,  Stopping user-988.slice.>
>>
>>
>> But when I ran it use Flink:
>>    bin/flink run readlog.jar
>>
>> I got the exception...  What should I do?
>>
>>
>> Starting execution of program
>>
>> ------------------------------------------------------------
>>   The program finished with the following exception:
>>
>> org.apache.flink.client.program.ProgramInvocationException: The main
>> method
>> caused an error.
>>     at
>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:524)
>>
>>     at
>> org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:403)
>>
>>     at
>> org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:331)
>>
>>     at
>> org.apache.flink.client.CliFrontend.executeProgram(CliFrontend.java:777)
>>     at org.apache.flink.client.CliFrontend.run(CliFrontend.java:253)
>>     at
>> org.apache.flink.client.CliFrontend.parseParameters(CliFrontend.java:1005)
>>
>>     at org.apache.flink.client.CliFrontend.main(CliFrontend.java:1048)
>> Caused by: java.lang.RuntimeException: java.sql.SQLException: No
>> suitable
>> driver found for jdbc:calcite:
>>     at
>> org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:151)
>>     at
>> org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:106)
>>     at
>> org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:127)
>>     at
>> org.apache.flink.api.table.FlinkRelBuilder$.create(FlinkRelBuilder.scala:56)
>>
>>     at
>> org.apache.flink.api.table.TableEnvironment.<init>(TableEnvironment.scala:73)
>>
>>     at
>> org.apache.flink.api.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:58)
>>
>>     at
>> org.apache.flink.api.java.table.StreamTableEnvironment.<init>(StreamTableEnvironment.scala:45)
>>
>>     at
>> org.apache.flink.api.table.TableEnvironment$.getTableEnvironment(TableEnvironment.scala:376)
>>
>>     at
>> org.apache.flink.api.table.TableEnvironment.getTableEnvironment(TableEnvironment.scala)
>>
>>     at
>> org.myorg.quickstart.ReadingFromKafka2.main(ReadingFromKafka2.java:48)
>>     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>     at
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>
>>     at
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>
>>     at java.lang.reflect.Method.invoke(Method.java:498)
>>     at
>> org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:509)
>>
>>     ... 6 more
>> Caused by: java.sql.SQLException: No suitable driver found for
>> jdbc:calcite:
>>     at java.sql.DriverManager.getConnection(DriverManager.java:689)
>>     at java.sql.DriverManager.getConnection(DriverManager.java:208)
>>     at
>> org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:144)
>>     ... 20 more
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Stream-sql-query-in-Flink-tp8928.html
>> Sent from the Apache Flink User Mailing List archive. mailing list
>> archive at Nabble.com.
>
>

--
Freundliche Grüße / Kind Regards

Timo Walther

Follow me: @twalthr
https://www.linkedin.com/in/twalthr