[jira] [Closed] (FLINK-6176) Add JARs to CLASSPATH deterministically

["Stephan Ewen (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Stephan Ewen closed FLINK-6176.
-------------------------------

> Add JARs to CLASSPATH deterministically
> ---------------------------------------
>
>                 Key: FLINK-6176
>                 URL: https://issues.apache.org/jira/browse/FLINK-6176
>             Project: Flink
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.2.0
>            Reporter: Scott Kidder
>            Assignee: Greg Hogan
>             Fix For: 1.3.0
>
>
> The {{config.sh}} script uses the following shell-script function to build the {{FLINK_CLASSPATH}} variable from a listing of JAR files in the {{$FLINK_LIB_DIR}} directory:
> {code}
> constructFlinkClassPath() {
>     while read -d '' -r jarfile ; do
>         if [[ $FLINK_CLASSPATH = "" ]]; then
>             FLINK_CLASSPATH="$jarfile";
>         else
>             FLINK_CLASSPATH="$FLINK_CLASSPATH":"$jarfile"
>         fi
>     done < <(find "$FLINK_LIB_DIR" ! -type d -name '*.jar' -print0)
>     echo $FLINK_CLASSPATH
> }
> {code}
> The {{find}} command as specified will return files in directory-order, which varies by OS and filesystem.
> The inconsistent ordering of directory contents caused problems for me when installing a Flink Docker image onto new machine with a newer version of Docker and different filesystem (UFS). The differences in the Docker filesystem implementation led to different ordering of the directory contents; this affected the {{FLINK_CLASSPATH}} ordering and generated very puzzling {{NoClassNotFoundException}} errors when running my Flink application.
> This should be addressed by deterministically ordering JAR files added to the {{FLINK_CLASSPATH}}.



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