sqoop ERROR tool.ImportTool: Import failed: org.apache.hadoop.fs.UnsupportedFileSystemException: No FileSystem for scheme "null"

[#1]

Trying to import data from oracle DB and getting error

.... 19/07/31 13:07:10 INFO orm.CompilationManager: Writing jar file: /tmp/sqoop-myuser/compile/375d3de163797c05cd7b480fddcfe58c/QueryResult.jar 19/07/31 13:07:10 ERROR tool.ImportTool: Import failed: org.apache.hadoop.fs.UnsupportedFileSystemException: No FileSystem for scheme "null"     at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:3281)     at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:3301) ....

My sqoop command looks like...

sqoop import \
    -Dmapreduce.map.memory.mb=3144 -Dmapreduce.map.java.opts=-Xmx1048m \
    -Dyarn.app.mapreduce.am.log.level=DEBUG \
    -Dmapreduce.map.log.level=DEBUG \
    -Dmapreduce.reduce.log.level=DEBUG \
    -Dmapred.job.name="Ora import table $tablename" \
    -Djava.security.egd=file:///dev/urandom \
    -Djava.security.egd=file:///dev/urandom \
    -Doraoop.timestamp.string=false \
    -Dmapreduce.map.max.attempts=10 \
    $oracle_cnxn_str \
    --as-parquetfile \
    --target-dir /some/hdfs/path \
    -query "$sqoop_query" \
    --split-by $splitby \
    --where "1=1" \
    --num-mappers 12 \
    --delete-target-dir

Not sure what to make of this error message. Any debugging suggestions or fixes?

[#2 · Accepted solution]

Issue was that the --target-dir path included some variables in the start of the path and ended up with the path looking like

//some/hdfs/path

and the "empty" // was confusing sqoop.