回复：does flink support yarn/hdfs HA?
Posted by 邓俊华 on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/does-flink-support-yarn-hdfs-HA-tp16448p16492.html
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/does-flink-support-yarn-hdfs-HA-tp16448p16492.html
hi Till,
The issue can be fixed by the below solution.
In org.apache.flink.yarnYarnApplicationMasterRunner.java:
replace "final YarnConfiguration yarnConfig = new YarnConfiguration();" with "final YarnConfiguration yarnConfig = new YarnConfiguration(HadoopUtils.getHadoopConfiguration());"
In org.apache.flink.runtime.util.HadoopUtils.java:
add the below code in getHadoopConfiguration()
if (new File(possibleHadoopConfPath + "/yarn-site.xml").exists()) {
retConf.addResource(new org.apache.hadoop.fs.Path(possibleHadoopConfPath + "/yarn-site.xml"));
if (LOG.isDebugEnabled()) {
LOG.debug("Adding " + possibleHadoopConfPath + "/yarn-site.xml to hadoop configuration");
}
}
retConf.addResource(new org.apache.hadoop.fs.Path(possibleHadoopConfPath + "/yarn-site.xml"));
if (LOG.isDebugEnabled()) {
LOG.debug("Adding " + possibleHadoopConfPath + "/yarn-site.xml to hadoop configuration");
}
}
I am using flink-1.3.2 and I also find it happened in flink-1.4-snapshot. Hope it won't happened in new realease.
------------------------------------------------------------发件人：邓俊华 <[hidden email]>发送时间：2017年10月31日(星期二) 11:16收件人：Till Rohrmann <[hidden email]>抄 送：Stephan Ewen <[hidden email]>; user <[hidden email]>; 黄亮 <[hidden email]>主 题：回复：does flink support yarn/hdfs HA?hi Till,I have a test with the solution you provide. But it didn't fix the issue.1> There is no 'org.apache.flink.runtime.util.HadoopUtils' in flink-1.3.2,it's in flink-1.4.0-snapshot.It can't change to final YarnConfiguration yarnConfig = new YarnConfiguration(org.apache.flink.runtime.util.HadoopUtils.HadoopUtils.getHadoopConfiguration(flinkConfiguration)); to fix the issue.2> There is another api ''org.apache.flink.api.java.hadoop.mapred.utils.HadoopUtils" to get hdfs-site.xml and core-site.xml. So I changed to as below:final YarnConfiguration yarnConfig = new YarnConfiguration(org.apache.flink.api.java.hadoop.mapred.utils.HadoopUtils.getHadoopConfiguration());It truelly can read hdfs/core file,but it can't read yarn-site.xml now.So can I think flink doesn't support yarn/hdfs HA for now? It support the default configuration for yarn and can't read the yarn conf with custom configuration?2017-10-31 11:14:12,860 DEBUG org.apache.hadoop.ipc.Client - IPC Client (2096450263) connection to spark2/174.18.4.205:9000 from admin: stopped, remaining connections 12017-10-31 11:14:13,259 INFO org.apache.flink.yarn.YarnJobManager - Attempting to recover all jobs.2017-10-31 11:14:13,260 DEBUG org.apache.flink.runtime.jobmanager.ZooKeeperSubmittedJobGraphStore - Retrieving all stored job ids from ZooKeeper under flink/application_1508845594022_0020/jobgraphs.2017-10-31 11:14:13,261 DEBUG org.apache.zookeeper.ClientCnxn - Reading reply sessionid:0x15cf415d94c00ee, packet:: clientPath:null serverPath:null finished:false header:: 55,3 replyHeader:: 55,8592068434,0 request:: '/flink/application_1508845594022_0020/jobgraphs,F response:: s{8592068425,8592068425,1509419643087,1509419643087,0,0,0,0,0,0,8592068425} 2017-10-31 11:14:13,263 DEBUG org.apache.zookeeper.ClientCnxn - Reading reply sessionid:0x15cf415d94c00ee, packet:: clientPath:null serverPath:null finished:false header:: 56,12 replyHeader:: 56,8592068434,0 request:: '/flink/application_1508845594022_0020/jobgraphs,F response:: v{},s{8592068425,8592068425,1509419643087,1509419643087,0,0,0,0,0,0,8592068425} 2017-10-31 11:14:13,264 INFO org.apache.flink.yarn.YarnJobManager - There are no jobs to recover.2017-10-31 11:14:13,487 INFO org.apache.hadoop.ipc.Client - Retrying connect to server: 0.0.0.0/0.0.0.0:8030. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)2017-10-31 11:14:13,489 DEBUG org.apache.hadoop.ipc.Client - closing ipc connection to 0.0.0.0/0.0.0.0:8030: Connection refusedjava.net.ConnectException: Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:744) at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:531) at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:495) at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:614) at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:712) at org.apache.hadoop.ipc.Client$Connection.access$2900(Client.java:375) at org.apache.hadoop.ipc.Client.getConnection(Client.java:1528) at org.apache.hadoop.ipc.Client.call(Client.java:1451) at org.apache.hadoop.ipc.Client.call(Client.java:1412) at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229) at com.sun.proxy.$Proxy15.registerApplicationMaster(Unknown Source) at org.apache.hadoop.yarn.api.impl.pb.client.ApplicationMasterProtocolPBClientImpl.registerApplicationMaster(ApplicationMasterProtocolPBClientImpl.java:107)------------------------------------------------------------------发件人：Till Rohrmann <[hidden email]>发送时间：2017年10月27日(星期五) 20:24收件人：邓俊华 <[hidden email]>抄 送：Stephan Ewen <[hidden email]>; user <[hidden email]>主 题：Re: does flink support yarn/hdfs HA?Hi,
looking at the code, the
YarnConfigurationonly loads thecore-site.xmland theyarn-site.xmland does not load thehdfs-site.xml. This seems to be on purpose and, thus, we should try to add it. I think the solution could be as easy asfinal YarnConfiguration yarnConfig = new YarnConfiguration(HadoopUtils.getHadoopConfiguration(flinkConfiguration));Do you want to open a JIRA issue and a PR for this issue?
Cheers,
TillOn Fri, Oct 27, 2017 at 1:59 PM, 邓俊华 <[hidden email]> wrote:it pass the "final YarnConfiguration yarnConfig = new YarnConfiguration();" in https://github.com/apache/flink/blob/master/flink-yarn/src/main/java/org/apache/flink/yarn/YarnApplicationMasterRunner.java not the conf in https://github.com/apache/flink/blob/master/flink-filesystems/flink-hadoop-fs/src/main/java/org/apache/flink/runtime/util/HadoopUtils.java;See------------------------------------------------------------------发件人：Stephan Ewen <[hidden email]>发送时间：2017年10月27日(星期五) 19:50收件人：邓俊华 <[hidden email]>抄 送：user <[hidden email]>; Stephan Ewen <[hidden email]>; Till Rohrmann <[hidden email]>主 题：Re: does flink support yarn/hdfs HA?The it should probably work to apply a similar logic to the YarnConfiguration loading as to the Hadoop Filesystem configuration loading in https://github.com/apache/flink/blob/master/flink-filesystems/flink-hadoop-fs/src/main/java/org/apache/flink/runtime/util/HadoopUtils.javaOn Fri, Oct 27, 2017 at 1:42 PM, 邓俊华 <[hidden email]> wrote:Yes, every yarn cluster node has *-site.xml and YARN_CONF_DIR and HADOOP_CONF_DIR be configured in every yarn cluster node.------------------------------------------------------------------发件人：Stephan Ewen <[hidden email]>发送时间：2017年10月27日(星期五) 19:38收件人：user <[hidden email]>抄 送：邓俊华 <[hidden email]>; Till Rohrmann <[hidden email]>主 题：Re: does flink support yarn/hdfs HA?Hi!The HDFS config resolution logic is in [1]. It should take the environment variable into account.The problem (bug) seems to be that in the Yarn Utils, the configuration used for Yarn (AppMaster) loads purely from classpath, not from the environment variables.And that classpath does not include the proper hdfs-site.xml.Now, there are two ways I could imagine fixing that:(1) When instantiating the Yarn Configuration, also add resources from the environment variable as in [1].(2) The client (which puts together all the resources that should be in the classpath of the processes running on Yarn needs to add hadoop these config files to the resources.Are the environment variables YARN_CONF_DIR and HADOOP_CONF_DIR typically defined on the nodes of a Yarn cluster?StephanOn Fri, Oct 27, 2017 at 12:38 PM, 邓俊华 <[hidden email]> wrote:hi,Now I run spark streming on yarn with yarn/HA. I want to migrate spark streaming to flink. But it can't work. It can't conncet to hdfs logical namenode url.It always throws exception as fllow. I tried to trace the flink code and I found there maybe something wrong when read the hadoop conf.As fllow, code the failoverProxyProvider is null , so it think it's a No-HA case. The YarnConfiguration didn't read hdfs-site.xml to get "dfs.client.failover.proxy.provider.startdt" value,only yarn-site.xml and core-site.xml be read.I have configured and export YARN_CONF_DIR and HADOOP_CONF_DIR in /etc/profile and I am sure there are *-site.xml in this diretory. I can also get the value in env.Can anybody provide me some advice?2017-10-25 21:02:14,721 DEBUG org.apache.hadoop.hdfs.BlockReaderLocal - dfs.domain.socket.path =
2017-10-25 21:02:14,755 ERROR org.apache.flink.yarn.YarnApplicationMasterRunner - YARN Application Master initialization failed
java.lang.IllegalArgumentException: java.net.UnknownHostException: startdt
at org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:378)
at org.apache.hadoop.hdfs.NameNodeProxies.createNonHAProxy(NameNodeProxies.java:310)
at org.apache.hadoop.hdfs.NameNodeProxies.createProxy(NameNodeProxies.java:176)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:678)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:619)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:149)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2669)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:94)
at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2703)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2685)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:373)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:295)
at org.apache.flink.yarn.Utils.createTaskExecutorContext(Utils.java:385)
at org.apache.flink.yarn.YarnApplicationMasterRunner.runApplicationMaster(YarnApplicationMasterRunner.java:324)
at org.apache.flink.yarn.YarnApplicationMasterRunner$1.call(YarnApplicationMasterRunner.java:195)
at org.apache.flink.yarn.YarnApplicationMasterRunner$1.call(YarnApplicationMasterRunner.java:192)
at org.apache.flink.runtime.security.HadoopSecurityContext$1.run(HadoopSecurityContext.java:43)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:<a href="tel:1698" style="color:#000000;font-family:Tahoma,Arial;font-size:14.0px;font-style:normal;font-variant:normal;font-weight:normal;text-transform:none;">1698)
at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:40)
at org.apache.flink.yarn.YarnApplicationMasterRunner.run(YarnApplicationMasterRunner.java:192)
at org.apache.flink.yarn.YarnApplicationMasterRunner.main(YarnApplicationMasterRunner.java:116)
Caused by: java.net.UnknownHostException: startdt
... 23 more
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