milleruntime opened a new issue #1976:
URL: https://github.com/apache/accumulo/issues/1976
**Describe the bug**
Context classloader fails to load class from the shell.
**Versions (OS, Maven, Java, and others, as appropriate):**
- Affected version(s) of this project: 2.1
**To Reproduce**
Follow the instructions for the classpath example:
https://github.com/apache/accumulo-examples/blob/main/docs/classpath.md
**Expected behavior**
The filter should be loaded by the shell for the iterator specified.
**Additional context**
The shell reports:
`2021-03-25T15:55:23,854 [shell.Shell] ERROR:
org.apache.accumulo.shell.ShellCommandException: Command could not be
initialized (Unable to load org.apache.accumulo.test.FooFilter; class not
found.)`
The tserver log is aware of the context and the jar in HDFS but doesn't
report any errors:
<pre>
2021-03-26T08:17:23,999 [vfs.ContextManager] DEBUG: ClassLoader not created
for context cx1, creating new one. uris:
hdfs://localhost:8020/user1/lib/FooFilter.jar, preDelegation: true
2021-03-26T08:17:24,002 [vfs.AccumuloVFSClassLoader] DEBUG: Resolving path
element: hdfs://localhost:8020/user1/lib/FooFilter.jar
2021-03-26T08:17:24,063 [vfs.AccumuloReloadingVFSClassLoader] DEBUG:
monitoring hdfs://localhost:8020/user1/lib/FooFilter.jar
2021-03-26T08:17:24,064 [vfs.ContextManager] DEBUG: Returning classloader
for context cx1
2021-03-26T08:18:05,043 [vfs.ContextManager] DEBUG: Managed Contexts:
{cx1=org.apache.accumulo.start.classloader.vfs.ContextManager$Context@55348174}
2021-03-26T08:18:05,043 [vfs.ContextManager] DEBUG: Configured Contexts:
[cx1]
</pre>
The original bug in the examples repo is here:
https://github.com/apache/accumulo-examples/issues/66
I believe the changes to deprecate the VFS classloader may have broke the
expected behavior. This was done in:
https://github.com/apache/accumulo/pull/1715
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