In my performance cluster(hbase vesion 0.90.3). There are a lot of warn logs, below as:
2011-05-21 11:35:10,325 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server handler 43 on 20020 took 11569 ms appending an edit to hlog; editcount=23862, len~=4.8k 2011-05-21 11:50:23,610 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server handler 8 on 20020 took 1118 ms appending an edit to hlog; editcount=37591, len~=5.4k 2011-05-21 11:53:27,703 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server handler 82 on 20020 took 11203 ms appending an edit to hlog; editcount=38388, len~=1.9k 2011-05-21 12:14:54,469 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server handler 27 on 20020 took 12013 ms appending an edit to hlog; editcount=36144, len~=7.6k 2011-05-21 12:54:08,440 WARN org.apache.hadoop.hbase.regionserver.wal.HLog: IPC Server handler 85 on 20020 took 3330 ms appending an edit to hlog; editcount=2, len~=6.3k The resource(RAM, CPU, network) seems enough. Is it a bug for hdfs?
