[jira] [Created] (FLINK-18302) Sql client uses wrong class loader when execute INSERT statements

[Shang Yuanchun (Jira)]

Jark Wu created FLINK-18302:
-------------------------------

             Summary: Sql client uses wrong class loader when execute INSERT statements
                 Key: FLINK-18302
                 URL: https://issues.apache.org/jira/browse/FLINK-18302
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Client
            Reporter: Jark Wu
            Assignee: Jark Wu
             Fix For: 1.11.0


Sql-client when execute INSERT statements does not use the user class loader from ExecutionContext. This makes it impossible to run queries with UDF in it if the dependencies are added with {{--jar}} flag.

This can be reproduced when I migrate {{SQLClientKafkaITCase}} to use DDL (FLINK-18086).

It give exception:

{code}
Exception in thread "main" org.apache.flink.table.client.SqlClientException: Unexpected exception. This is a bug. Please consider filing an issue.
        at org.apache.flink.table.client.SqlClient.main(SqlClient.java:213)
Caused by: java.lang.RuntimeException: Error running SQL job.
        at org.apache.flink.table.client.gateway.local.LocalExecutor.executeUpdateInternal(LocalExecutor.java:595)
        at org.apache.flink.table.client.gateway.local.LocalExecutor.executeUpdate(LocalExecutor.java:515)
        at org.apache.flink.table.client.cli.CliClient.callInsert(CliClient.java:596)
        at org.apache.flink.table.client.cli.CliClient.callCommand(CliClient.java:315)
        at java.util.Optional.ifPresent(Optional.java:159)
        at org.apache.flink.table.client.cli.CliClient.open(CliClient.java:212)
        at org.apache.flink.table.client.SqlClient.openCli(SqlClient.java:142)
        at org.apache.flink.table.client.SqlClient.start(SqlClient.java:114)
        at org.apache.flink.table.client.SqlClient.main(SqlClient.java:201)
Caused by: java.lang.RuntimeException: Could not execute program.
        at org.apache.flink.table.client.gateway.local.ProgramDeployer.deploy(ProgramDeployer.java:84)
        at org.apache.flink.table.client.gateway.local.LocalExecutor.executeUpdateInternal(LocalExecutor.java:592)
        ... 8 more
Caused by: org.apache.flink.util.FlinkRuntimeException: org.apache.flink.api.common.InvalidProgramException: Table program cannot be compiled. This is a bug. Please file an issue.
        at org.apache.flink.table.runtime.generated.CompileUtils.compile(CompileUtils.java:68)
        at org.apache.flink.table.runtime.generated.GeneratedClass.compile(GeneratedClass.java:78)
        at org.apache.flink.table.runtime.generated.GeneratedClass.getClass(GeneratedClass.java:96)
        at org.apache.flink.table.runtime.operators.CodeGenOperatorFactory.getStreamOperatorClass(CodeGenOperatorFactory.java:51)
        at org.apache.flink.streaming.api.graph.StreamingJobGraphGenerator.preValidate(StreamingJobGraphGenerator.java:217)
        at org.apache.flink.streaming.api.graph.StreamingJobGraphGenerator.createJobGraph(StreamingJobGraphGenerator.java:154)
        at org.apache.flink.streaming.api.graph.StreamingJobGraphGenerator.createJobGraph(StreamingJobGraphGenerator.java:109)
        at org.apache.flink.streaming.api.graph.StreamGraph.getJobGraph(StreamGraph.java:850)
        at org.apache.flink.client.StreamGraphTranslator.translateToJobGraph(StreamGraphTranslator.java:52)
        at org.apache.flink.client.FlinkPipelineTranslationUtil.getJobGraph(FlinkPipelineTranslationUtil.java:43)
        at org.apache.flink.client.deployment.executors.PipelineExecutorUtils.getJobGraph(PipelineExecutorUtils.java:55)
        at org.apache.flink.client.deployment.executors.AbstractSessionClusterExecutor.execute(AbstractSessionClusterExecutor.java:57)
        at org.apache.flink.table.client.gateway.local.ProgramDeployer.deploy(ProgramDeployer.java:82)
        ... 9 more
Caused by: org.apache.flink.shaded.guava18.com.google.common.util.concurrent.UncheckedExecutionException: org.apache.flink.api.common.InvalidProgramException: Table program cannot be compiled. This is a bug. Please file an issue.
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2203)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache.get(LocalCache.java:3937)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LocalManualCache.get(LocalCache.java:4739)
        at org.apache.flink.table.runtime.generated.CompileUtils.compile(CompileUtils.java:66)
        ... 21 more
Caused by: org.apache.flink.api.common.InvalidProgramException: Table program cannot be compiled. This is a bug. Please file an issue.
        at org.apache.flink.table.runtime.generated.CompileUtils.doCompile(CompileUtils.java:81)
        at org.apache.flink.table.runtime.generated.CompileUtils.lambda$compile$1(CompileUtils.java:66)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LocalManualCache$1.load(LocalCache.java:4742)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
        at org.apache.flink.shaded.guava18.com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
        ... 24 more
Caused by: org.codehaus.commons.compiler.CompileException: Line 13, Column 30: Cannot determine simple type name "org"
{code}


The reason is that we only wrap classloader for the inner {{applyUpdate}}, but not the outer {{executeUpdateInternal}}. However, {{ProgramDeployer#deploy()}} in {{executeUpdateInternal}} will invoke code compile which throws this exception.



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