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https://issues.apache.org/jira/browse/FLINK-9234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16488654#comment-16488654
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Timo Walther commented on FLINK-9234:
-------------------------------------

I'm thinking about reverting this change. It pulls in different logging classes 
for all dependencies that use {{flink-table}}. This problem will be fixed in 
1.6 anyway by FLINK-8511 which I might merge today. Users of the external 
catalogs can still add the dependency themselves. What do you think [~fhueske]?

> Commons Logging is missing from shaded Flink Table library
> ----------------------------------------------------------
>
>                 Key: FLINK-9234
>                 URL: https://issues.apache.org/jira/browse/FLINK-9234
>             Project: Flink
>          Issue Type: Bug
>          Components: Table API & SQL
>    Affects Versions: 1.4.2
>         Environment: jdk1.8.0_172
> flink 1.4.2
> Mac High Sierra
>            Reporter: Eron Wright 
>            Assignee: Timo Walther
>            Priority: Blocker
>             Fix For: 1.5.0, 1.4.3
>
>         Attachments: repro.scala
>
>
> The flink-table shaded library seems to be missing some classes from 
> {{org.apache.commons.logging}} that are required by 
> {{org.apache.commons.configuration}}.  Ran into the problem while using the 
> external catalog support, on Flink 1.4.2.
> See attached a repro, which produces:
> {code}
> Exception in thread "main" java.lang.NoClassDefFoundError: 
> org/apache/flink/table/shaded/org/apache/commons/logging/Log
>       at 
> org.apache.flink.table.catalog.ExternalTableSourceUtil$.parseScanPackagesFromConfigFile(ExternalTableSourceUtil.scala:153)
>       at 
> org.apache.flink.table.catalog.ExternalTableSourceUtil$.<init>(ExternalTableSourceUtil.scala:55)
>       at 
> org.apache.flink.table.catalog.ExternalTableSourceUtil$.<clinit>(ExternalTableSourceUtil.scala)
>       at 
> org.apache.flink.table.catalog.ExternalCatalogSchema.getTable(ExternalCatalogSchema.scala:78)
>       at 
> org.apache.calcite.jdbc.SimpleCalciteSchema.getImplicitTable(SimpleCalciteSchema.java:82)
>       at 
> org.apache.calcite.jdbc.CalciteSchema.getTable(CalciteSchema.java:256)
>       at 
> org.apache.calcite.jdbc.CalciteSchema$SchemaPlusImpl.getTable(CalciteSchema.java:561)
>       at 
> org.apache.flink.table.api.TableEnvironment.scanInternal(TableEnvironment.scala:497)
>       at 
> org.apache.flink.table.api.TableEnvironment.scan(TableEnvironment.scala:485)
>       at Repro$.main(repro.scala:17)
>       at Repro.main(repro.scala)
> {code}
> Dependencies:
> {code}
>     compile 'org.slf4j:slf4j-api:1.7.25'
>     compile 'org.slf4j:slf4j-log4j12:1.7.25'
>     runtime 'log4j:log4j:1.2.17'
>     compile 'org.apache.flink:flink-scala_2.11:1.4.2'
>     compile 'org.apache.flink:flink-streaming-scala_2.11:1.4.2'
>     compile 'org.apache.flink:flink-clients_2.11:1.4.2'
>     compile 'org.apache.flink:flink-table_2.11:1.4.2'
> {code}



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