Returns information about the various HBase region server clients in AsyncHBase. This helps to identify issues with a particular region server. (v2.2)
No parameters available.
Query String
http://localhost:4242/api/stats/region_clients
The response is an array of objects. Fields in the response include:
| Name | Data Type | Description | Example |
|---|---|---|---|
| pendingBreached | Integer | The total number of times writes to a new region client were discarded because it's pending RPC buffer was full. This should almost always be zero and a positive value indicates the TSD took a long time to connect to a region server. | 0 |
| writesBlocked | Integer | How many RPCs (batched or individual) in total were blocked due to the connection's send buffer being full. A positive value indicates a slow HBase server or poor network performance. | 0 |
| inflightBreached | Integer | The total number of times RPCs were blocked due to too many outstanding RPCs waiting for a response from HBase. A positive value indicates the region server is slow or network performance is poor. | 0 |
| dead | Boolean | Whether or not the region client is marked as dead due to a connection close event (such as region server going down) | false |
| rpcsInFlight | Integer | The current number of RPCs sent to HBase and awaiting a response. | 10 |
| rpcsSent | Integer | The total number of RPCs sent to HBase. | 424242 |
| rpcResponsesUnknown | Integer | The total number of responses received from HBase for which we couldn't find an RPC. This may indicate packet corruption or an incompatible HBase version. | 0 |
| pendingBatchedRPCs | Integer | The number of RPCs queued in the batched RPC awaiting the next flush or the batch limit. | 0 |
| endpoint | String | The IP and port of the region server in the format '/<ip>:<port>' | /127.0.0.1:35008 |
| rpcResponsesTimedout | Integer | The total number of responses from HBase for RPCs that have previously timedout. This means HBase may be catching up and responding to stale RPCs. | 0 |
| rpcid | Integer | The ID of the last RPC sent to HBase. This may be a negative number | 42 |
| rpcsTimedout | Integer | The total number of RPCs that have timed out. This may indicate a slow region server, poor network performance or GC issues with the TSD. | 0 |
| pendingRPCs | Integer | The number of RPCs queued and waiting for the connection handshake with the region server to complete | 0 |
[
{
"pendingBreached": 0,
"writesBlocked": 0,
"inflightBreached": 0,
"dead": false,
"rpcsInFlight": 0,
"rpcsSent": 35704,
"rpcResponsesUnknown": 0,
"pendingBatchedRPCs": 452,
"endpoint": "/127.0.0.1:35008",
"rpcResponsesTimedout": 0,
"rpcid": 35703,
"rpcsTimedout": 0,
"pendingRPCs": 0
}
]
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Licensed under the GNU LGPLv2.1+ and GPLv3+ licenses.
http://opentsdb.net/docs/build/html/api_http/stats/region_clients.html