[NIFI-9552] Ranger extension throws NoClassDefFoundError when try to create a TrustStore with it

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.15.2
• Fix Version/s: 1.16.0
• Assignee: Zoltán Kornél Török
• Reporter: Zoltán Kornél Török
• Created: 07/Jan/22 10:45
• Updated: 18/Jan/22 14:53
• Resolved: 18/Jan/22 14:53

Description

When I execute the following command to create truststore:

 java -cp "nifi-assembly/target/nifi-1.13.2-bin/nifi-1.13.2/ext/ranger/install/lib/*" org.apache.ranger.credentialapi.buildks create sslTrustStore -value "test" -provider "jceks://test.jceks" 

then I got the following error:

SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
    at org.apache.hadoop.fs.FileSystem.<clinit>(FileSystem.java:135)
    at org.apache.hadoop.fs.Path.getFileSystem(Path.java:361)
    at org.apache.hadoop.security.alias.JavaKeyStoreProvider.initFileSystem(JavaKeyStoreProvider.java:89)
    at org.apache.hadoop.security.alias.AbstractJavaKeyStoreProvider.<init>(AbstractJavaKeyStoreProvider.java:85)
    at org.apache.hadoop.security.alias.JavaKeyStoreProvider.<init>(JavaKeyStoreProvider.java:49)
    at org.apache.hadoop.security.alias.JavaKeyStoreProvider.<init>(JavaKeyStoreProvider.java:41)
    at org.apache.hadoop.security.alias.JavaKeyStoreProvider$Factory.createProvider(JavaKeyStoreProvider.java:100)
    at org.apache.hadoop.security.alias.CredentialProviderFactory.getProviders(CredentialProviderFactory.java:73)
    at org.apache.ranger.credentialapi.CredentialReader.getDecryptedString(CredentialReader.java:59)
    at org.apache.ranger.credentialapi.buildks.createCredential(buildks.java:80)
    at org.apache.ranger.credentialapi.buildks.main(buildks.java:40)
Caused by: java.lang.ClassNotFoundException: org.apache.commons.logging.LogFactory
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    ... 11 more 

Problem analisys

The error happens bacause of  NIFI-9491.

The missing dependency included in the pom.xml (https://github.com/apache/nifi/blob/main/nifi-nar-bundles/nifi-ranger-bundle/nifi-ranger-resources/pom.xml#L58) however during assembly, the jar is not copied under ext/ranger/install/lib/ directory.

The reason behind is probably, because the lib has provided scope:

[INFO] --- maven-dependency-plugin:3.1.2:tree (default-cli) @ nifi-ranger-plugin ---
[INFO] org.apache.nifi:nifi-ranger-plugin:jar:1.16.0-SNAPSHOT
[INFO] \- org.slf4j:jcl-over-slf4j:jar:1.7.32:provided 

Workaround

copy the jcl-over-slf4j lib to ext/ranger/install/lib/  directory.

 

Issue Links

• links to: GitHub Pull Request #5643
• links to: GitHub Pull Request #5663