Dahyun Ko created AMBARI-26530:
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Summary: Enable support for symlinked mpack installation scripts
in Jetty 11
Key: AMBARI-26530
URL: https://issues.apache.org/jira/browse/AMBARI-26530
Project: Ambari
Issue Type: Improvement
Components: ambari-server
Affects Versions: 3.0.0
Environment: Rocky 8
JDK 17
Python 3.11
Reporter: Dahyun Ko
Fix For: 3.0.0
h3. Summary
With the recent upgrade to Jetty 11 from the following commit AMBARI-26288,
Ambari is no longer be able to access mpack installation scripts that are
symlinked. This is due to Jetty 11 disallows serving files through symbolic
links by default.
h3. Steps to reproduce the issue
# Install an Ambari mpack.
# Attempt to trigger mpack installation on Ambari UI web.
h3. Expected Behavior
* Observe the mpack installation failure with following error message:
{code:java}
WARNING 2025-07-16 01:34:12,850 FileCache.py:229 - Error occurred during cache
update. Error tolerate setting is set to true, so ignoring this error and
continuing with current cache. Error details: Can not download file from url
https://rocky8tpl:8446/resources/common-services/AIRFLOW/2.8.3/package/.hash :
HTTP Error 404: Not Found {code}
h3. Proposed Solution
* Explicitly enable symlink usage with SymlinkAllowedResourceAliasChecker.
{code:java}
import org.eclipse.jetty.server.SymlinkAllowedResourceAliasChecker;
import org.eclipse.jetty.util.resource.Resource;
File resourcesDirectory = new File(configs.getResourceDirPath());
Resource baseResource =
Resource.newResource(resourcesDirectory.getParentFile().getAbsolutePath());
root.addAliasCheck(new SymlinkAllowedResourceAliasChecker(root, baseResource));
{code}
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