zeroflag opened a new pull request, #783:
URL: https://github.com/apache/knox/pull/783
## What changes were proposed in this pull request?
Validating if shared provider is used by a descriptor before deleting it via
hadoop xml resource monitor.
## How was this patch tested?
Enabling monitor:
```xml
<property>
<name>gateway.cloudera.manager.descriptors.monitor.interval</name>
<value>5000</value>
</property>
```
hxr file
```xml
<configuration>
<property>
<name>topology3</name>
<value>
discoveryType=ClouderaManager#
discoveryAddress=http://host:123#
discoveryUser=user#
discoveryPasswordAlias=alias#
cluster=Cluster 1#
providerConfigRef=used#
app:knoxauth:param1.name=param1.value#
app:admin-ui#
HIVE:url=http://localhost:456#
HIVE:version=1.0#
HIVE:httpclient.connectionTimeout=5m#
HIVE:httpclient.socketTimeout=100m
</value>
</property>
<property>
<name>providerConfigs:used,unused</name>
<value>remove</value>
</property>
</configuration>
```
Observed log messages:
```
2023-08-14 13:08:50,085 WARN knox.gateway
(HadoopXmlResourceParserResult.java:check(54)) - Not deleting provider used as
it is referenced by on ore more descriptors.
2023-08-14 13:08:50,111 INFO knox.gateway
(HadoopXmlResourceMonitor.java:processDeleted(120)) - Deleting file
/Users/attilamagyar/development/test/conf/shared-providers/unused.json
```
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