ERROR tool.ImportTool: Import failed: java.io.IOException: Could not load jar /tmp/sqoop-root/ ....

[#1]

I run the following sqoop merge import

sudo sqoop import \
--connect 'jdbc:sqlserver://1.1.1.1\test_server;database=Training' \
--username Training_user --password Training_user \
--table BigDataTest -m 1 \
--check-column lastmodified \
--merge-key id \
--incremental lastmodified \
--compression-codec=snappy \
--as-parquetfile \
--target-dir /user/hive/warehouse \
--hive-table bigDataTest \
--last-value '2019-05-06 15:07:49.917'

I get this

.
.
.
19/05/09 11:00:50 INFO tool.ImportTool: Final destination exists, will run merge job.
19/05/09 11:00:50 ERROR tool.ImportTool: Import failed: java.io.IOException: Could not load jar /tmp/sqoop-root/compile/e913f7c459cf4e1cdb8a8d5802f1dac2/codegen_BigDataTest.jar into JVM. (Cou
ld not find class BigDataTest.)
	at org.apache.sqoop.util.ClassLoaderStack.addJarFile(ClassLoaderStack.java:92)
	at com.cloudera.sqoop.util.ClassLoaderStack.addJarFile(ClassLoaderStack.java:36)
	at org.apache.sqoop.tool.ImportTool.loadJars(ImportTool.java:120)
	at org.apache.sqoop.tool.ImportTool.lastModifiedMerge(ImportTool.java:456)
	at org.apache.sqoop.tool.ImportTool.importTable(ImportTool.java:522)
	at org.apache.sqoop.tool.ImportTool.run(ImportTool.java:621)
	at org.apache.sqoop.Sqoop.run(Sqoop.java:147)
	at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
	at org.apache.sqoop.Sqoop.runSqoop(Sqoop.java:183)
	at org.apache.sqoop.Sqoop.runTool(Sqoop.java:234)
	at org.apache.sqoop.Sqoop.runTool(Sqoop.java:243)
	at org.apache.sqoop.Sqoop.main(Sqoop.java:252)
Caused by: java.lang.ClassNotFoundException: BigDataTest
	at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.net.FactoryURLClassLoader.loadClass(URLClassLoader.java:789)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:270)
	at org.apache.sqoop.util.ClassLoaderStack.addJarFile(ClassLoaderStack.java:88)
	... 11 more

why? and how I can fix it ?

[#2]

I found this resolution elsewhere:

    The problem is resolved after i copied the .class file from /tmp/sqoop-hduser/compile/ to hdfs /home/hduser/ and also the current working directory from where i am running sqoop.

In case that does not work, this should help you get moving:

Specify the --bindir where the compiled code and .jar file should be located.

Without these arguments, Sqoop would place the generated Java source file in your current working directory and the compiled .class file and .jar file in /tmp/sqoop-<username>/compile.

With an example:

sqoop import --bindir ./ --connect jdbc:mysql://localhost/hadoopguide --table widgets