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https://issues.apache.org/jira/browse/HDFS-9473?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Brahma Reddy Battula resolved HDFS-9473.
----------------------------------------
Resolution: Not A Problem
> access standy namenode slow
> ---------------------------
>
> Key: HDFS-9473
> URL: https://issues.apache.org/jira/browse/HDFS-9473
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: wei.he
>
> access standy namenode slow
> we have a hadoop cluster with 200 nodes. And use ha namenodes.
> nn1 hadoop109 active
> nn2 hadoop110 standby
> after we switchover nms,
> hadoop110(nn2) is active
> hadoop109(nn1) is standy
> when we access hdfs://hadoop109:8020 ( hdfs dfs -ls hdfs://hadoop109:8020),
> that get the response sometimes fast, sometimes slow.
> I tuned the rpc parameters about dfs.namenode.handler.count and
> dfs.namenode.service.handler.count . the value from 105 to 150 (
> >=20*ln(datanodes) ).
> But the problem still occured.
> Does someone have the same problem, and could give some suggestion ?
> take a look the debug log....
> 15/11/27 19:37:46 DEBUG util.Shell: setsid exited with exit code 0
> 15/11/27 19:37:46 DEBUG conf.Configuration: parsing URL
> jar:file:/usr/local/hadoop-2.4.0/share/hadoop/common/hadoop-common-2.4.0.jar!/core-default.xml
> 15/11/27 19:37:46 DEBUG conf.Configuration: parsing input stream
> sun.net.www.protocol.jar.JarURLConnection$JarURLInputStream@720c653f
> 15/11/27 19:37:46 DEBUG conf.Configuration: parsing URL
> file:/usr/local/hadoop-2.4.0/etc/hadoop/core-site.xml
> 15/11/27 19:37:46 DEBUG conf.Configuration: parsing input stream
> java.io.BufferedInputStream@7038ce7b
> 15/11/27 19:37:47 DEBUG security.Groups: Creating new Groups object
> 15/11/27 19:37:47 DEBUG util.NativeCodeLoader: Trying to load the
> custom-built native-hadoop library...
> 15/11/27 19:37:47 DEBUG util.NativeCodeLoader: Loaded the native-hadoop
> library
> 15/11/27 19:37:47 DEBUG security.JniBasedUnixGroupsMapping: Using
> JniBasedUnixGroupsMapping for Group resolution
> 15/11/27 19:37:47 DEBUG security.JniBasedUnixGroupsMappingWithFallback: Group
> mapping impl=org.apache.hadoop.security.JniBasedUnixGroupsMapping
> 15/11/27 19:37:47 DEBUG security.Groups: Group mapping
> impl=org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback;
> cacheTimeout=300000; warningDeltaMs=5000
> 15/11/27 19:37:47 DEBUG security.UserGroupInformation: hadoop login
> 15/11/27 19:37:47 DEBUG security.UserGroupInformation: hadoop login commit
> 15/11/27 19:37:47 DEBUG security.UserGroupInformation: using local
> user:UnixPrincipal: hdfs
> 15/11/27 19:37:47 DEBUG security.UserGroupInformation: UGI loginUser:hdfs
> (auth:SIMPLE)
> 15/11/27 19:37:47 DEBUG hdfs.BlockReaderLocal:
> dfs.client.use.legacy.blockreader.local = false
> 15/11/27 19:37:47 DEBUG hdfs.BlockReaderLocal: dfs.client.read.shortcircuit =
> true
> 15/11/27 19:37:47 DEBUG hdfs.BlockReaderLocal:
> dfs.client.domain.socket.data.traffic = false
> 15/11/27 19:37:47 DEBUG hdfs.BlockReaderLocal: dfs.domain.socket.path =
> /var/lib/hadoop-hdfs/dn_socket
> 15/11/27 19:37:47 DEBUG retry.RetryUtils: multipleLinearRandomRetry = null
> 15/11/27 19:37:48 DEBUG ipc.Server: rpcKind=RPC_PROTOCOL_BUFFER,
> rpcRequestWrapperClass=class
> org.apache.hadoop.ipc.ProtobufRpcEngine$RpcRequestWrapper,
> rpcInvoker=org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker@739820e5
> 15/11/27 19:37:48 DEBUG ipc.Client: getting client out of cache:
> org.apache.hadoop.ipc.Client@42988fee
> 15/11/27 19:37:49 DEBUG unix.DomainSocketWatcher:
> org.apache.hadoop.net.unix.DomainSocketWatcher$1@7116778b: starting with
> interruptCheckPeriodMs = 60000
> 15/11/27 19:37:49 DEBUG hdfs.BlockReaderLocal: The short-circuit local reads
> feature is enabled.
> 15/11/27 19:37:49 DEBUG ipc.Client: The ping interval is 60000 ms.
> 15/11/27 19:37:49 DEBUG ipc.Client: Connecting to hadoop109:8020
> 15/11/27 19:37:49 DEBUG ipc.Client: IPC Client (320922331) connection to
> hadoop109:8020 from hdfs: starting, having connections 1
> .........# response 4 mins #...........
> 15/11/27 19:37:49 DEBUG ipc.Client: IPC Client (320922331) connection to
> hadoop109:8020 from hdfs sending #0
> 15/11/27 19:41:16 DEBUG ipc.Client: IPC Client (320922331) connection to
> hadoop109:8020 from hdfs got value #0
> ......................
> ls: Operation category READ is not supported in state standby
> 15/11/27 19:41:16 DEBUG ipc.Client: stopping client from cache:
> org.apache.hadoop.ipc.Client@42988fee
> 15/11/27 19:41:16 DEBUG ipc.Client: removing client from cache:
> org.apache.hadoop.ipc.Client@42988fee
> 15/11/27 19:41:16 DEBUG ipc.Client: stopping actual client because no more
> references remain: org.apache.hadoop.ipc.Client@42988fee
> 15/11/27 19:41:16 DEBUG ipc.Client: Stopping client
> 15/11/27 19:41:16 DEBUG ipc.Client: IPC Client (320922331) connection to
> hadoop109:8020 from hdfs: closed
> 15/11/27 19:41:16 DEBUG ipc.Client: IPC Client (320922331) connection to
> hadoop109:8020 from hdfs: stopped, remaining connections 0
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