Does anybody have any thoughts on this? On Fri, Jun 17, 2016 at 6:36 PM Jonathan Kelly <jonathaka...@gmail.com> wrote:
> I'm trying to debug a problem in Spark 2.0.0-SNAPSHOT > (commit bdf5fe4143e5a1a393d97d0030e76d35791ee248) where Spark's > log4j.properties is not getting picked up in the executor classpath (and > driver classpath for yarn-cluster mode), so Hadoop's log4j.properties file > is taking precedence in the YARN containers. > > Spark's log4j.properties file is correctly being bundled into the > __spark_conf__.zip file and getting added to the DistributedCache, but it > is not in the classpath of the executor, as evidenced by the following > command, which I ran in spark-shell: > > scala> sc.parallelize(Seq(1)).map(_ => > getClass().getResource("/log4j.properties")).first > res3: java.net.URL = file:/etc/hadoop/conf.empty/log4j.properties > > I then ran the following in spark-shell to verify the classpath of the > executors: > > scala> sc.parallelize(Seq(1)).map(_ => > System.getProperty("java.class.path")).flatMap(_.split(':')).filter(e => > !e.endsWith(".jar") && !e.endsWith("*")).collect.foreach(println) > ... > > /mnt/yarn/usercache/hadoop/appcache/application_1466208403287_0003/container_1466208403287_0003_01_000003 > > /mnt/yarn/usercache/hadoop/appcache/application_1466208403287_0003/container_1466208403287_0003_01_000003/__spark_conf__ > /etc/hadoop/conf > ... > > So the JVM has this nonexistent __spark_conf__ directory in the classpath > when it should really be __spark_conf__.zip (which is actually a symlink > to a directory, despite the .zip filename). > > % sudo ls -l > /mnt/yarn/usercache/hadoop/appcache/application_1466208403287_0003/container_1466208403287_0003_01_000003 > total 20 > -rw-r--r-- 1 yarn yarn 88 Jun 18 01:26 container_tokens > -rwx------ 1 yarn yarn 594 Jun 18 01:26 > default_container_executor_session.sh > -rwx------ 1 yarn yarn 648 Jun 18 01:26 default_container_executor.sh > -rwx------ 1 yarn yarn 4419 Jun 18 01:26 launch_container.sh > lrwxrwxrwx 1 yarn yarn 59 Jun 18 01:26 __spark_conf__.zip -> > /mnt1/yarn/usercache/hadoop/filecache/17/__spark_conf__.zip > lrwxrwxrwx 1 yarn yarn 77 Jun 18 01:26 __spark_libs__ -> > /mnt/yarn/usercache/hadoop/filecache/16/__spark_libs__4490748779530764463.zip > drwx--x--- 2 yarn yarn 46 Jun 18 01:26 tmp > > Does anybody know why this is happening? Is this a bug in Spark, or is it > the JVM doing this (possibly because the extension is .zip)? > > Thanks, > Jonathan >