[IGNITE-8777] REST: metadata command failed on cluster of size 1.

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.5
• Component/s: rest
• Labels: newbie
• Assignee: Chandresh Pancholi
• Reporter: Alexey Kuznetsov
• Created: 13/Jun/18 04:19
• Updated: 01/Aug/18 17:20

Description

Start *only one *node.
Execute REST command: http://localhost:8080/ignite?cmd=getorcreate&cacheName=myNewPartionedCache&backups=2
Cache will be created.

Execute http://localhost:8080/ignite?cmd=metadata&cacheName=myNewPartionedCache
Error will be returned:

{“successStatus”:1,“error”:“Failed to handle request: [req=CACHE_METADATA, err=Failed to request meta data. myNewPartionedCache is not found]“,”response”:null,“sessionToken”:null}

After some debug, I see in code GridCacheCommandHandler.MetadataTask#map:

...
for (int i = 1; i < subgrid.size(); i++) {
 ....
}

if (map.isEmpty())
                    throw new IgniteException("Failed to request meta data. " + cacheName + " is not found");
...

So, in case of cluster with only one node this code will throw exception.

I guess the fix should be - just replace "int i = 1" with "int i = 0".

Issue Links

• links to: GitHub Pull Request #4181