[HBASE-27764] scan table is slow when enter hbase shell first time

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.4.14
• Component/s: Client, shell
• Assignee: Unassigned
• Reporter: chaijunjie
• Created: 29/Mar/23 03:54
• Updated: 27/Jun/23 07:12

Description

When we test HBase 2.4.14 on our cluster...

I find we  scan a table is slow when enter hbase shell first time.

step like this:

hbase shell

scan 'hbase:meta',{LIMIT=>1}

the cost time is more than HBase 1.3

Any one can help compare the two versions(HBase 2.x vs HBase 1.x) in first scan process?

thanks~

 

-------

I find the the “Future<Result> f = cs.poll(timeBeforeReplicas, TimeUnit.MICROSECONDS);” in org.apache.hadoop.hbase.client.RpcRetryingCallerWithReadReplicas#call 

cost above 200+ms

 

Issue Links

• is related to: HBASE-19260 Add lock back to avoid parallel accessing meta to locate region
• is related to: HBASE-27228 Client connection warming API
• is related to: HBASE-26590 Hbase-client Meta lookup performance regression between hbase-1 and hbase-2