Flink SQL client: SELECT 'hello world' throws [ERROR] Could not execute SQL statement

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Flink SQL client: SELECT 'hello world' throws [ERROR] Could not execute SQL statement

Yik San Chan
The question is cross-posted in Stack Overflow https://stackoverflow.com/questions/66813644/flink-sql-client-select-hello-world-throws-error-could-not-execute-sql-stat.

I am following Flink SQL client docs https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/sqlClient.html#dependencies. Opening the Flink SQL client looks fine, but `SELECT 'hello world'` doesn't work.

```
$ /data/apache/flink/flink-1.12.0/bin/sql-client.sh embedded
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/data/apache/flink/flink-1.12.0/lib/log4j-slf4j-impl-2.12.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/data/apache/hadoop/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
No default environment specified.
Searching for '/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml'...found.
Reading default environment from: file:/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml
No session environment specified.

Command history file path: /data/home/pal-flink/.flink-sql-history
                                   ▒▓██▓██▒
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           ▓█    █ ▓███▓▒░              ░▓▓▓███▓          ░▒░ ▓█
           ██▓    ██▒    ░▒▓▓███▓▓▓▓▓██████▓▒            ▓███  █
          ▓███▒ ███   ░▓▓▒░░   ░▓████▓░                  ░▒▓▒  █▓
          █▓▒▒▓▓██  ░▒▒░░░▒▒▒▒▓██▓░                            █▓
          ██ ▓░▒█   ▓▓▓▓▒░░  ▒█▓       ▒▓▓██▓    ▓▒          ▒▒▓
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    ______ _ _       _       _____  ____  _         _____ _ _            _  BETA
   |  ____| (_)     | |     / ____|/ __ \| |       / ____| (_)          | |
   | |__  | |_ _ __ | | __ | (___ | |  | | |      | |    | |_  ___ _ __ | |_
   |  __| | | | '_ \| |/ /  \___ \| |  | | |      | |    | | |/ _ \ '_ \| __|
   | |    | | | | | |   <   ____) | |__| | |____  | |____| | |  __/ | | | |_
   |_|    |_|_|_| |_|_|\_\ |_____/ \___\_\______|  \_____|_|_|\___|_| |_|\__|

        Welcome! Enter 'HELP;' to list all available commands. 'QUIT;' to exit.


Flink SQL> SELECT 'Hello World';
[ERROR] Could not execute SQL statement. Reason:
org.apache.flink.runtime.client.JobSubmissionException: Failed to submit JobGraph.
```

Any help? Thanks.

Best,
Yik San
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Re: Flink SQL client: SELECT 'hello world' throws [ERROR] Could not execute SQL statement

David Anderson-4
There needs to be a Flink session cluster available to the SQL client on which it can run the jobs created by your queries. See the Getting Started [1] section of the SQL Client documentation for more information:

The SQL Client is bundled in the regular Flink distribution and thus runnable out-of-the-box. It requires only a running Flink cluster where table programs can be executed. For more information about setting up a Flink cluster see the Cluster & Deployment part [2]. If you simply want to try out the SQL Client, you can also start a local cluster with one worker using the following command:

./bin/start-cluster.sh

Regards,
David

On Fri, Mar 26, 2021 at 9:50 AM Yik San Chan <[hidden email]> wrote:
The question is cross-posted in Stack Overflow https://stackoverflow.com/questions/66813644/flink-sql-client-select-hello-world-throws-error-could-not-execute-sql-stat.

I am following Flink SQL client docs https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/sqlClient.html#dependencies. Opening the Flink SQL client looks fine, but `SELECT 'hello world'` doesn't work.

```
$ /data/apache/flink/flink-1.12.0/bin/sql-client.sh embedded
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/data/apache/flink/flink-1.12.0/lib/log4j-slf4j-impl-2.12.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/data/apache/hadoop/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
No default environment specified.
Searching for '/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml'...found.
Reading default environment from: file:/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml
No session environment specified.

Command history file path: /data/home/pal-flink/.flink-sql-history
                                   ▒▓██▓██▒
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           ██▓    ██▒    ░▒▓▓███▓▓▓▓▓██████▓▒            ▓███  █
          ▓███▒ ███   ░▓▓▒░░   ░▓████▓░                  ░▒▓▒  █▓
          █▓▒▒▓▓██  ░▒▒░░░▒▒▒▒▓██▓░                            █▓
          ██ ▓░▒█   ▓▓▓▓▒░░  ▒█▓       ▒▓▓██▓    ▓▒          ▒▒▓
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                  ░▓██▒                          ▓░  ▒█▓█  ░░▒▒▒
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    ______ _ _       _       _____  ____  _         _____ _ _            _  BETA
   |  ____| (_)     | |     / ____|/ __ \| |       / ____| (_)          | |
   | |__  | |_ _ __ | | __ | (___ | |  | | |      | |    | |_  ___ _ __ | |_
   |  __| | | | '_ \| |/ /  \___ \| |  | | |      | |    | | |/ _ \ '_ \| __|
   | |    | | | | | |   <   ____) | |__| | |____  | |____| | |  __/ | | | |_
   |_|    |_|_|_| |_|_|\_\ |_____/ \___\_\______|  \_____|_|_|\___|_| |_|\__|

        Welcome! Enter 'HELP;' to list all available commands. 'QUIT;' to exit.


Flink SQL> SELECT 'Hello World';
[ERROR] Could not execute SQL statement. Reason:
org.apache.flink.runtime.client.JobSubmissionException: Failed to submit JobGraph.
```

Any help? Thanks.

Best,
Yik San
Reply | Threaded
Open this post in threaded view
|

Re: Flink SQL client: SELECT 'hello world' throws [ERROR] Could not execute SQL statement

Yik San Chan
Thank you for the information. 

On Fri, Mar 26, 2021 at 5:14 PM David Anderson <[hidden email]> wrote:
There needs to be a Flink session cluster available to the SQL client on which it can run the jobs created by your queries. See the Getting Started [1] section of the SQL Client documentation for more information:

The SQL Client is bundled in the regular Flink distribution and thus runnable out-of-the-box. It requires only a running Flink cluster where table programs can be executed. For more information about setting up a Flink cluster see the Cluster & Deployment part [2]. If you simply want to try out the SQL Client, you can also start a local cluster with one worker using the following command:

./bin/start-cluster.sh

Regards,
David

On Fri, Mar 26, 2021 at 9:50 AM Yik San Chan <[hidden email]> wrote:
The question is cross-posted in Stack Overflow https://stackoverflow.com/questions/66813644/flink-sql-client-select-hello-world-throws-error-could-not-execute-sql-stat.

I am following Flink SQL client docs https://ci.apache.org/projects/flink/flink-docs-stable/dev/table/sqlClient.html#dependencies. Opening the Flink SQL client looks fine, but `SELECT 'hello world'` doesn't work.

```
$ /data/apache/flink/flink-1.12.0/bin/sql-client.sh embedded
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/data/apache/flink/flink-1.12.0/lib/log4j-slf4j-impl-2.12.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/data/apache/hadoop/hadoop-2.7.3/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.apache.logging.slf4j.Log4jLoggerFactory]
No default environment specified.
Searching for '/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml'...found.
Reading default environment from: file:/data/apache/flink/flink-1.12.0/conf/sql-client-defaults.yaml
No session environment specified.

Command history file path: /data/home/pal-flink/.flink-sql-history
                                   ▒▓██▓██▒
                               ▓████▒▒█▓▒▓███▓▒
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           ▒██▓ ▓█ █▓█       ░▒█████▓▓▒░         ██▒▒  █ ▒  ▓█▒
           ▓█▓  ▓█ ██▓ ░▓▓▓▓▓▓▓▒              ▒██▓           ░█▒
           ▓█    █ ▓███▓▒░              ░▓▓▓███▓          ░▒░ ▓█
           ██▓    ██▒    ░▒▓▓███▓▓▓▓▓██████▓▒            ▓███  █
          ▓███▒ ███   ░▓▓▒░░   ░▓████▓░                  ░▒▓▒  █▓
          █▓▒▒▓▓██  ░▒▒░░░▒▒▒▒▓██▓░                            █▓
          ██ ▓░▒█   ▓▓▓▓▒░░  ▒█▓       ▒▓▓██▓    ▓▒          ▒▒▓
          ▓█▓ ▓▒█  █▓░  ░▒▓▓██▒            ░▓█▒   ▒▒▒░▒▒▓█████▒
           ██░ ▓█▒█▒  ▒▓▓▒  ▓█                █░      ░░░░   ░█▒
           ▓█   ▒█▓   ░     █░                ▒█              █▓
            █▓   ██         █░                 ▓▓        ▒█▓▓▓▒█░
             █▓ ░▓██░       ▓▒                  ▓█▓▒░░░▒▓█░    ▒█
              ██   ▓█▓░      ▒                    ░▒█▒██▒      ▓▓
               ▓█▒   ▒█▓▒░                         ▒▒ █▒█▓▒▒░░▒██
                ░██▒    ▒▓▓▒                     ▓██▓▒█▒ ░▓▓▓▓▒█▓
                  ░▓██▒                          ▓░  ▒█▓█  ░░▒▒▒
                      ▒▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░░▓▓  ▓░▒█░

    ______ _ _       _       _____  ____  _         _____ _ _            _  BETA
   |  ____| (_)     | |     / ____|/ __ \| |       / ____| (_)          | |
   | |__  | |_ _ __ | | __ | (___ | |  | | |      | |    | |_  ___ _ __ | |_
   |  __| | | | '_ \| |/ /  \___ \| |  | | |      | |    | | |/ _ \ '_ \| __|
   | |    | | | | | |   <   ____) | |__| | |____  | |____| | |  __/ | | | |_
   |_|    |_|_|_| |_|_|\_\ |_____/ \___\_\______|  \_____|_|_|\___|_| |_|\__|

        Welcome! Enter 'HELP;' to list all available commands. 'QUIT;' to exit.


Flink SQL> SELECT 'Hello World';
[ERROR] Could not execute SQL statement. Reason:
org.apache.flink.runtime.client.JobSubmissionException: Failed to submit JobGraph.
```

Any help? Thanks.

Best,
Yik San