Nitiraj Singh Rathore created HDFS-12108: --------------------------------------------
Summary: Hdfs tail -f command keeps printing the last line in loop when more data is not available Key: HDFS-12108 URL: https://issues.apache.org/jira/browse/HDFS-12108 Project: Hadoop HDFS Issue Type: Bug Components: hdfs-client Affects Versions: 2.7.3 Reporter: Nitiraj Singh Rathore I tried to do the simple tail -f expecting that new data will keep appearing on console, but I found out that in the absence of new data the last line of the file keeps printing again and again. See the below output. For clarification I have also pasted the output of cat command for the same file. bq. [hdfs@c6401 lib]$ hdfs dfs -tail -f /ats/active/application_1499594381431_0001/appattempt_1499594381431_0001_000001/domainlog-appattempt_1499594381431_0001_000001 bq. {"id":"Tez_ATS_application_1499594381431_0001","readers":"*","writers":"hive"} bq. {"id":"Tez_ATS_application_1499594381431_0001_1","readers":"*","writers":"hive"} bq. {"id":"Tez_ATS_application_1499594381431_0001_1","readers":"*","writers":"hive"} bq. {"id":"Tez_ATS_application_1499594381431_0001_1","readers":"*","writers":"hive"} bq. {"id":"Tez_ATS_application_1499594381431_0001_1","readers":"*","writers":"hive"} bq. bq. [hdfs@c6401 lib]$ hdfs dfs -cat /ats/active/application_1499594381431_0001/appattempt_1499594381431_0001_000001/domainlog-appattempt_1499594381431_0001_000001 bq. {"id":"Tez_ATS_application_1499594381431_0001","readers":"*","writers":"hive"} bq. {"id":"Tez_ATS_application_1499594381431_0001_1","readers":"*","writers":"hive"}[hdfs@c6401 lib]$ -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org