does flink support yarn/hdfs HA?
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does flink support yarn/hdfs HA?
 
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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: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 |
Re: does flink support yarn/hdfs HA?
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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. Stephan On Fri, Oct 27, 2017 at 12:38 PM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
Yes, every yarn cluster node has *-site.xml and YARN_CONF_DIR and HADOOP_CONF_DIR be configured in every yarn cluster node.
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Re: does flink support yarn/hdfs HA?
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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/
On Fri, Oct 27, 2017 at 1:42 PM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
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
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Re: does flink support yarn/hdfs HA?
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Hi, looking at the code, the Do you want to open a JIRA issue and a PR for this issue? Cheers, On Fri, Oct 27, 2017 at 1:59 PM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
Sure, I will have a test! 邓俊华 大数据开发 - Mob：151-5811-4898 - Tel：0571-28121848 - Web：www.startdt.com - Email：dengjunhua@startdt.com 杭州市余杭区仓前街道仓兴街1号38幢
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
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 1
2017-10-31 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 refused
java.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)
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
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"); } } 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.
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Re: does flink support yarn/hdfs HA?
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Hi, thanks for looking into the problem. I actually opened a PR [1] for fixing this but it does not include the changes to I’m wondering why you have to add explicitly the [1] https://github.com/apache/flink/pull/4926 Cheers, On Tue, Oct 31, 2017 at 7:11 AM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
hi, When I use "new YarnConfiguration(HadoopUtils.getHadoopConfiguration())" in flink-1.3.2,I can't get yarn-site.xml property. So I get it from HadoopUtils.getHadoopConfiguration(). The attached file is the bin/yarn-session.sh classpath. And the HADOOP_CONF_DIR/YARN_CONF_DIR as below, I am sure there are *-site.xml.
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Re: does flink support yarn/hdfs HA?
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Quick question, did you configure the Cheers, On Wed, Nov 1, 2017 at 9:58 AM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
HADOOP_CONF_DIR has been set in /etc/profile and can be get in ·env·. I truely set yarn.application.classpath in yarn-site.xml but not include hadoop conf dir in it,does is make the issues?
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Re: does flink support yarn/hdfs HA?
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Yes, changing the I’m not entirely sure what the idiomatic Yarn way would be either including HADOOP_CONF_DIR in the classpath and assuming that all resources must be accessible from there or to allow explicit lookup of configuration files. My gut feeling is that it shouldn’t hurt to add the explicit resource loading. However, it could lead to the situation that people unknowingly load a configuration file which they thought would be read from the classpath, because the explicit loading would override the classpath resource. Not sure whether this is an issue. Cheers, On Wed, Nov 1, 2017 at 2:45 PM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
Have add *-site.xml to yarn.application.classpath,please see the attached file. But still encount the same issue(ie. can't read yarn-site.xml in YarnConfiguration). Can it be possible load yarn-site.xml in HadoopUtils.java? Thus we can ignore yarn.application.classpath.
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Re: does flink support yarn/hdfs HA?
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Hi, I think you only have to add Cheers, On Thu, Nov 2, 2017 at 3:53 AM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
I have tried to add /data/hadoop/etc/hadoop/ to yarn classpath, it's not work.
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Re: does flink support yarn/hdfs HA?
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Hmm this is a bit strange. Could it be by any chance that any of your other dependencies has a yarn-site.xml packaged? You could try setting the hadoop configuration classpath entry to the front of the classpath. This should give it precedence if I'm not mistaken. Cheers, Till On Thu, Nov 2, 2017 at 9:58 AM, 邓俊华 <[hidden email]> wrote:
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
hi Till, I have see the PR(https://github.com/apache/flink/pull/4926). Does that mean it's not a issue? But the issue still happened in flink-1.4.How can i fix the issue? 邓俊华 大数据开发 - Mob：151-5811-4898 - Tel：0571-28121848 - Web：www.startdt.com - Email：dengjunhua@startdt.com 杭州市余杭区仓前街道仓兴街1号38幢
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回复：does flink support yarn/hdfs HA?
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In reply to this post by 邓俊华
hi Till, I have see the PR(https://github.com/apache/flink/pull/4926). Does that mean it's not a issue? But the issue still happened in flink-1.4.How can i fix the issue?
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