I have my HDP cluster set-up with Zeppelin. I'm trying to get a few more interpreters installed but I keep running into an error when I try.   I am behind a proxy, but I have my environment variables set per Zeppelin documentation and verified when I echo them.   My Maven central repo settings is: http://insecure.repo1.maven.org/maven2/ I had no luck with the default central address or the HTTPS version.   Anyone run into this and found a work-around?     admin@tan1:/usr/hdp/3.1.4.0-315/zeppelin/bin$ sudo ./install-interpreter.sh --name shell,python OpenJDK 64-Bit Server VM warning: ignoring option MaxPermSize=512m; support was removed in 8.0 SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/zeppelin/lib/interpreter/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/zeppelin/lib/slf4j-simple-1.6.4.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/usr/hdp/3.1.4.0-315/zeppelin/lib/slf4j-log4j12-1.7.10.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory] Install shell(org.apache.zeppelin:zeppelin-shell:0.8.0) to /usr/hdp/3.1.4.0-315/zeppelin/interpreter/shell ... org.sonatype.aether.RepositoryException: Cannot fetch dependencies for org.apache.zeppelin:zeppelin-shell:0.8.0 at org.apache.zeppelin.dep.DependencyResolver.getArtifactsWithDep(DependencyResolver.java:179) at org.apache.zeppelin.dep.DependencyResolver.loadFromMvn(DependencyResolver.java:128) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:76) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:93) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:85) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:170) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:134) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:126) at org.apache.zeppelin.interpreter.install.InstallInterpreter.main(InstallInterpreter.java:278) Caused by: java.lang.NullPointerException at org.sonatype.aether.impl.internal.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:352) at org.apache.zeppelin.dep.DependencyResolver.getArtifactsWithDep(DependencyResolver.java:176) ... 8 more Install python(org.apache.zeppelin:zeppelin-python:0.8.0) to /usr/hdp/3.1.4.0-315/zeppelin/interpreter/python ... org.sonatype.aether.RepositoryException: Cannot fetch dependencies for org.apache.zeppelin:zeppelin-python:0.8.0 at org.apache.zeppelin.dep.DependencyResolver.getArtifactsWithDep(DependencyResolver.java:179) at org.apache.zeppelin.dep.DependencyResolver.loadFromMvn(DependencyResolver.java:128) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:76) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:93) at org.apache.zeppelin.dep.DependencyResolver.load(DependencyResolver.java:85) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:170) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:134) at org.apache.zeppelin.interpreter.install.InstallInterpreter.install(InstallInterpreter.java:126) at org.apache.zeppelin.interpreter.install.InstallInterpreter.main(InstallInterpreter.java:278) Caused by: java.lang.NullPointerException at org.sonatype.aether.impl.internal.DefaultRepositorySystem.resolveDependencies(DefaultRepositorySystem.java:352) at org.apache.zeppelin.dep.DependencyResolver.getArtifactsWithDep(DependencyResolver.java:176) ... 8 more     ... View more