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 ▒▓██▓██▒ ▓████▒▒█▓▒▓███▓▒ ▓███▓░░ ▒▒▒▓██▒ ▒ ░██▒ ▒▒▓▓█▓▓▒░ ▒████ ██▒ ░▒▓███▒ ▒█▒█▒ ░▓█ ███ ▓░▒██ ▓█ ▒▒▒▒▒▓██▓░▒░▓▓█ █░ █ ▒▒░ ███▓▓█ ▒█▒▒▒ ████░ ▒▓█▓ ██▒▒▒ ▓███▒ ░▒█▓▓██ ▓█▒ ▓█▒▓██▓ ░█░ ▓░▒▓████▒ ██ ▒█ █▓░▒█▒░▒█▒ ███▓░██▓ ▓█ █ █▓ ▒▓█▓▓█▒ ░██▓ ░█░ █ █▒ ▒█████▓▒ ██▓░▒ ███░ ░ █░ ▓ ░█ █████▒░░ ░█░▓ ▓░ ██▓█ ▒▒▓▒ ▓███████▓░ ▒█▒ ▒▓ ▓██▓ ▒██▓ ▓█ █▓█ ░▒█████▓▓▒░ ██▒▒ █ ▒ ▓█▒ ▓█▓ ▓█ ██▓ ░▓▓▓▓▓▓▓▒ ▒██▓ ░█▒ ▓█ █ ▓███▓▒░ ░▓▓▓███▓ ░▒░ ▓█ ██▓ ██▒ ░▒▓▓███▓▓▓▓▓██████▓▒ ▓███ █ ▓███▒ ███ ░▓▓▒░░ ░▓████▓░ ░▒▓▒ █▓ █▓▒▒▓▓██ ░▒▒░░░▒▒▒▒▓██▓░ █▓ ██ ▓░▒█ ▓▓▓▓▒░░ ▒█▓ ▒▓▓██▓ ▓▒ ▒▒▓ ▓█▓ ▓▒█ █▓░ ░▒▓▓██▒ ░▓█▒ ▒▒▒░▒▒▓█████▒ ██░ ▓█▒█▒ ▒▓▓▒ ▓█ █░ ░░░░ ░█▒ ▓█ ▒█▓ ░ █░ ▒█ █▓ █▓ ██ █░ ▓▓ ▒█▓▓▓▒█░ █▓ ░▓██░ ▓▒ ▓█▓▒░░░▒▓█░ ▒█ ██ ▓█▓░ ▒ ░▒█▒██▒ ▓▓ ▓█▒ ▒█▓▒░ ▒▒ █▒█▓▒▒░░▒██ ░██▒ ▒▓▓▒ ▓██▓▒█▒ ░▓▓▓▓▒█▓ ░▓██▒ ▓░ ▒█▓█ ░░▒▒▒ ▒▓▓▓▓▓▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒░░▓▓ ▓░▒█░ ______ _ _ _ _____ ____ _ _____ _ _ _ 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
