Ramachandran Krishnan created RANGER-5718:
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Summary: PDP server logs NoClassDefFoundError for GsonBuilder —
gson JAR missing from pdp tarball lib/
Key: RANGER-5718
URL: https://issues.apache.org/jira/browse/RANGER-5718
Project: Ranger
Issue Type: Task
Components: Ranger
Reporter: Ramachandran Krishnan
Assignee: Ramachandran Krishnan
h2. Summary
Ranger PDP server logs an ERROR on every plugin initialization when
policies/tags are
downloaded from Admin:
{code}
ERROR AbstractRangerAdminClient: failed to create GsonBuilder object
java.lang.NoClassDefFoundError: com/google/gson/GsonBuilder
Caused by: java.lang.ClassNotFoundException: com.google.gson.GsonBuilder
{code}
Policy download and authorization still work because RangerAdminRESTClient uses
Jackson for REST JSON parsing. The error is non-fatal (caught in init(), gson
remains null) but is noisy and indicates an incomplete PDP classpath.
h2. Root Cause
distro/src/main/assembly/pdp.xml uses a strict binaries <includes> whitelist
for
lib/ dependencies. com.google.code.gson:gson is used by
AbstractRangerAdminClient (agents-common) but is NOT included in the whitelist,
unlike other plugin assemblies (KMS, Kafka, Solr, etc.) which explicitly
include gson.
h2. Notes
* Gson is used for file-based policy sources (EmbeddedResourcePolicySource,
LocalFolderPolicySource), not the normal Admin REST download path.
* Error occurs in PolicyRefresher.<init> →
RangerPluginContext.createAdminClient
→ AbstractRangerAdminClient.init() during lazy plugin creation on authorize.
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