[jira] [Created] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
Lee Hounshell created YARN-3642: --- Summary: Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value /property /configuration mapred-site.xml: configuration property namemapred.job.tracker/name valueqadoop-nn001.apsalar.com:8032/value /property property namemapreduce.framework.name/name valueyarn/value /property property namemapreduce.jobhistory.address/name valueqadoop-nn001.apsalar.com:10020/value descriptionthe JobHistoryServer address./description /property property namemapreduce.jobhistory.webapp.address/name valueqadoop-nn001.apsalar.com:19888/value descriptionthe JobHistoryServer web address/description /property /configuration hbase-site.xml: configuration property namehbase.master/name valueqadoop-nn001.apsalar.com:6/value /property property namehbase.rootdir/name valuehdfs://qadoop-nn001.apsalar.com:8020/hbase/value /property property namehbase.cluster.distributed/name valuetrue/value /property property namehbase.zookeeper.property.dataDir/name value/opt/local/zookeeper/value /property property namehbase.zookeeper.property.clientPort/name value2181/value /property property namehbase.zookeeper.quorum/name valueqadoop-nn001.apsalar.com/value /property property namezookeeper.session.timeout/name value18/value /property /configuration Reporter: Lee Hounshell There is an issue with Hadoop 2.7.0 when in distributed operation the datanode is unable to reach the yarn scheduler. In our yarn-site.xml, we have defined this path to be: property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property But when running an oozie job, the problem manifests when looking at the job logs for the yarn container. We see logs similar to the following showing the connection problem: Showing 4096 bytes. Click here for full log [main] org.apache.hadoop.http.HttpServer2: Jetty bound to port 64065 2015-05-13 17:49:33,930 INFO [main] org.mortbay.log: jetty-6.1.26 2015-05-13 17:49:33,971 INFO [main] org.mortbay.log: Extract
[jira] [Commented] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
[ https://issues.apache.org/jira/browse/YARN-3642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14544459#comment-14544459 ] Lee Hounshell commented on YARN-3642: - Here is a copy of our common /etc/hosts: ::1localhost 127.0.0.1 localhost loghost 10.1.0.220 35d47c6c-97c4-429c-a189-aeb5349eea43loghost 127.0.0.1 pgbackup 10.1.26.11 qadoop-batch.apsalar.com 10.1.26.1 qadoop-nn001.apsalar.com 10.1.26.2 qadoop-nn002.apsalar.com 10.1.26.3 qadoop-jt001.apsalar.com 10.1.26.4 qadoop-d001.apsalar.com 10.1.26.5 qadoop-d002.apsalar.com 10.1.26.6 qadoop-d003.apsalar.com 10.1.26.7 qadoop-master1a.apsalar.com 10.1.26.8 qadoop-shard1a.apsalar.com 10.1.26.9 qadoop-shard2a.apsalar.com Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java - Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value /property /configuration mapred-site.xml: configuration property namemapred.job.tracker/name valueqadoop-nn001.apsalar.com:8032/value /property property namemapreduce.framework.name/name valueyarn/value /property property namemapreduce.jobhistory.address/name valueqadoop-nn001.apsalar.com:10020/value descriptionthe JobHistoryServer address./description /property property namemapreduce.jobhistory.webapp.address/name valueqadoop-nn001.apsalar.com:19888/value descriptionthe JobHistoryServer web address/description /property /configuration hbase-site.xml: configuration property namehbase.master/name valueqadoop-nn001.apsalar.com:6/value /property property namehbase.rootdir/name valuehdfs://qadoop-nn001.apsalar.com:8020/hbase/value /property property namehbase.cluster.distributed/name valuetrue/value /property property namehbase.zookeeper.property.dataDir/name value/opt/local/zookeeper/value /property property namehbase.zookeeper.property.clientPort/name value2181/value /property property namehbase.zookeeper.quorum/name valueqadoop-nn001.apsalar.com/value /property property
[jira] [Commented] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
[ https://issues.apache.org/jira/browse/YARN-3642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14544450#comment-14544450 ] Lee Hounshell commented on YARN-3642: - Yes, we have the same /etc/hosts on all machines. We also have internal DNS with those. The problem is not name-resolution. Our yarn-site.conf is being read for all the other values. only the yarn.resourcemanager.scheduler.address is not properly loaded into the conf object. I won't be able to do a hostname test (in place of the hard-code IP) until sometime late next week. Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java - Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value /property /configuration mapred-site.xml: configuration property namemapred.job.tracker/name valueqadoop-nn001.apsalar.com:8032/value /property property namemapreduce.framework.name/name valueyarn/value /property property namemapreduce.jobhistory.address/name valueqadoop-nn001.apsalar.com:10020/value descriptionthe JobHistoryServer address./description /property property namemapreduce.jobhistory.webapp.address/name valueqadoop-nn001.apsalar.com:19888/value descriptionthe JobHistoryServer web address/description /property /configuration hbase-site.xml: configuration property namehbase.master/name valueqadoop-nn001.apsalar.com:6/value /property property namehbase.rootdir/name valuehdfs://qadoop-nn001.apsalar.com:8020/hbase/value /property property namehbase.cluster.distributed/name valuetrue/value /property property namehbase.zookeeper.property.dataDir/name value/opt/local/zookeeper/value /property property namehbase.zookeeper.property.clientPort/name value2181/value /property property namehbase.zookeeper.quorum/name valueqadoop-nn001.apsalar.com/value /property property namezookeeper.session.timeout/name value18/value /property /configuration Reporter: Lee Hounshell There is an issue with Hadoop 2.7.0 when in distributed operation the datanode is unable to reach the yarn
[jira] [Commented] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
[ https://issues.apache.org/jira/browse/YARN-3642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14544462#comment-14544462 ] Lee Hounshell commented on YARN-3642: - Here is a copy of our yarn-site.xml: ?xml version=1.0? !-- Licensed under the Apache License, Version 2.0 (the License); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an AS IS BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. See accompanying LICENSE file. -- configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java - Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value
[jira] [Commented] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
[ https://issues.apache.org/jira/browse/YARN-3642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14544502#comment-14544502 ] Lee Hounshell commented on YARN-3642: - Yes, we have a proper /etc/hosts That is not the problem. I am able to make it work by forcing the conf to have our yarn scheduler address IP. Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java - Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value /property /configuration mapred-site.xml: configuration property namemapred.job.tracker/name valueqadoop-nn001.apsalar.com:8032/value /property property namemapreduce.framework.name/name valueyarn/value /property property namemapreduce.jobhistory.address/name valueqadoop-nn001.apsalar.com:10020/value descriptionthe JobHistoryServer address./description /property property namemapreduce.jobhistory.webapp.address/name valueqadoop-nn001.apsalar.com:19888/value descriptionthe JobHistoryServer web address/description /property /configuration hbase-site.xml: configuration property namehbase.master/name valueqadoop-nn001.apsalar.com:6/value /property property namehbase.rootdir/name valuehdfs://qadoop-nn001.apsalar.com:8020/hbase/value /property property namehbase.cluster.distributed/name valuetrue/value /property property namehbase.zookeeper.property.dataDir/name value/opt/local/zookeeper/value /property property namehbase.zookeeper.property.clientPort/name value2181/value /property property namehbase.zookeeper.quorum/name valueqadoop-nn001.apsalar.com/value /property property namezookeeper.session.timeout/name value18/value /property /configuration Reporter: Lee Hounshell There is an issue with Hadoop 2.7.0 when in distributed operation the datanode is unable to reach the yarn scheduler. In our yarn-site.xml, we have defined this path to be: {code} property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property {code} But when running
[jira] [Commented] (YARN-3642) Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java
[ https://issues.apache.org/jira/browse/YARN-3642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=14545770#comment-14545770 ] Lee Hounshell commented on YARN-3642: - Rohith, Thank you very much for your help! You are correct. We are running 3 nodemanagers. After adding our yarn-site.xml to the CLASSPATH, (and putting back original code) we are able to successfully submit and run an oozie job. Our problem is solved. Hadoop2 yarn.resourcemanager.scheduler.address not loaded by RMProxy.java - Key: YARN-3642 URL: https://issues.apache.org/jira/browse/YARN-3642 Project: Hadoop YARN Issue Type: Bug Components: resourcemanager Affects Versions: 2.7.0 Environment: yarn-site.xml: configuration property nameyarn.nodemanager.aux-services/name valuemapreduce_shuffle/value /property property nameyarn.nodemanager.aux-services.mapreduce.shuffle.class/name valueorg.apache.hadoop.mapred.ShuffleHandler/value /property property nameyarn.resourcemanager.hostname/name valueqadoop-nn001.apsalar.com/value /property property nameyarn.resourcemanager.scheduler.address/name valueqadoop-nn001.apsalar.com:8030/value /property property nameyarn.resourcemanager.address/name valueqadoop-nn001.apsalar.com:8032/value /property property nameyarn.resourcemanager.webap.address/name valueqadoop-nn001.apsalar.com:8088/value /property property nameyarn.resourcemanager.resource-tracker.address/name valueqadoop-nn001.apsalar.com:8031/value /property property nameyarn.resourcemanager.admin.address/name valueqadoop-nn001.apsalar.com:8033/value /property property nameyarn.log-aggregation-enable/name valuetrue/value /property property descriptionWhere to aggregate logs to./description nameyarn.nodemanager.remote-app-log-dir/name value/var/log/hadoop/apps/value /property property nameyarn.web-proxy.address/name valueqadoop-nn001.apsalar.com:8088/value /property /configuration core-site.xml: configuration property namefs.defaultFS/name valuehdfs://qadoop-nn001.apsalar.com/value /property property namehadoop.proxyuser.hdfs.hosts/name value*/value /property property namehadoop.proxyuser.hdfs.groups/name value*/value /property /configuration hdfs-site.xml: configuration property namedfs.replication/name value2/value /property property namedfs.namenode.name.dir/name valuefile:/hadoop/nn/value /property property namedfs.datanode.data.dir/name valuefile:/hadoop/dn/dfs/value /property property namedfs.http.address/name valueqadoop-nn001.apsalar.com:50070/value /property property namedfs.secondary.http.address/name valueqadoop-nn002.apsalar.com:50090/value /property /configuration mapred-site.xml: configuration property namemapred.job.tracker/name valueqadoop-nn001.apsalar.com:8032/value /property property namemapreduce.framework.name/name valueyarn/value /property property namemapreduce.jobhistory.address/name valueqadoop-nn001.apsalar.com:10020/value descriptionthe JobHistoryServer address./description /property property namemapreduce.jobhistory.webapp.address/name valueqadoop-nn001.apsalar.com:19888/value descriptionthe JobHistoryServer web address/description /property /configuration hbase-site.xml: configuration property namehbase.master/name valueqadoop-nn001.apsalar.com:6/value /property property namehbase.rootdir/name valuehdfs://qadoop-nn001.apsalar.com:8020/hbase/value /property property namehbase.cluster.distributed/name valuetrue/value /property property namehbase.zookeeper.property.dataDir/name value/opt/local/zookeeper/value /property property namehbase.zookeeper.property.clientPort/name value2181/value /property property namehbase.zookeeper.quorum/name valueqadoop-nn001.apsalar.com/value /property property namezookeeper.session.timeout/name value18/value /property /configuration Reporter: Lee Hounshell There is an issue with Hadoop 2.7.0 when in distributed operation the datanode is unable to reach the yarn scheduler. In our yarn-site.xml, we have defined this path to be: {code} property