Varun Thacker created SOLR-8399:
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             Summary: New Admin Files UI making extra API calls
                 Key: SOLR-8399
                 URL: https://issues.apache.org/jira/browse/SOLR-8399
             Project: Solr
          Issue Type: Improvement
            Reporter: Varun Thacker
            Priority: Minor


I was playing around with the new Admin UI and noticed that the Files UI is 
making extra API calls to Solr . 

Steps to reproduce:
1. Go to the Admin UI, select collection, go to the files UI , select a file . 
So the end URL would be : 
http://localhost:8983/solr/#/gettingstarted/files?file=solrconfig.xml
2. Now click on another file ( say protwords.txt )

If you look at the logs these are the calls that this one click is making 

{code}
INFO  - 2015-12-10 09:50:46.808; [   ] org.apache.solr.servlet.HttpSolrCall; 
[admin] webapp=null path=/admin/cores 
params={indexInfo=false&wt=json&_=1449740448851} status=0 QTime=1 
INFO  - 2015-12-10 09:50:46.816; [c:gettingstarted s:shard2 r:core_node4 
x:gettingstarted_shard2_replica1] org.apache.solr.core.SolrCore; 
[gettingstarted_shard2_replica1] webapp=/solr path=/admin/file 
params={wt=json&_=1449740448963} status=0 QTime=7 
INFO  - 2015-12-10 09:50:46.819; [c:gettingstarted s:shard2 r:core_node4 
x:gettingstarted_shard2_replica1] org.apache.solr.core.SolrCore; 
[gettingstarted_shard2_replica1] webapp=/solr path=/admin/file 
params={file=protwords.txt&contentType=text/plain;charset%3Dutf-8&wt=json&_=1449740448963}
 status=0 QTime=1 
INFO  - 2015-12-10 09:50:46.838; [   ] org.apache.solr.servlet.HttpSolrCall; 
[admin] webapp=null path=/admin/info/system params={wt=json&_=1449740448854} 
status=0 QTime=30 
INFO  - 2015-12-10 09:50:46.879; [c:gettingstarted s:shard2 r:core_node4 
x:gettingstarted_shard2_replica1] org.apache.solr.core.SolrCore; 
[gettingstarted_shard2_replica1] webapp=/solr path=/admin/file 
params={file=lang&wt=json&_=1449740448963} status=0 QTime=12 
INFO  - 2015-12-10 09:50:46.925; [   ] 
org.apache.solr.handler.admin.CollectionsHandler; Invoked Collection Action 
:list with params action=LIST&wt=json&_=1449740448853 
INFO  - 2015-12-10 09:50:46.925; [   ] org.apache.solr.servlet.HttpSolrCall; 
[admin] webapp=null path=/admin/collections 
params={action=LIST&wt=json&_=1449740448853} status=0 QTime=0
{code}

Now the same steps when repeated on the old UI leads to these log lines

{code}
INFO  - 2015-12-10 09:51:13.623; [c:gettingstarted s:shard1 r:core_node3 
x:gettingstarted_shard1_replica1] org.apache.solr.core.SolrCore; 
[gettingstarted_shard1_replica1] webapp=/solr path=/admin/file 
params={wt=json&_=1449741073613} status=0 QTime=5 
INFO  - 2015-12-10 09:51:13.623; [c:gettingstarted s:shard1 r:core_node3 
x:gettingstarted_shard1_replica1] org.apache.solr.core.SolrCore; 
[gettingstarted_shard1_replica1] webapp=/solr path=/admin/file 
params={file=protwords.txt&contentType=text/plain;charset%3Dutf-8&_=1449741073616}
 status=0 QTime=1 
{code}


So looks like the new admin UI is making addition calls to core admin, 
collections api and asking for the lang file?



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