Application logs are not saved in text format. They are saved in a binary format called TFile. You can use the "yarn logs"[1] command to view them. Alternatively you can use a tool like this tfile reader[2].
[1] - https://hadoop.apache.org/docs/r2.7.4/hadoop-yarn/hadoop-yarn-site/YarnCommands.html#logs [2] - https://github.com/alexandruanghel/hadoop-snippets/tree/master/read-tfile Thanks, Hari On Thu, May 10, 2018 at 6:06 AM, <[email protected]> wrote: > Hello， > > > > I set “yarn.log-aggregation-enable” to true, and got logs on HDFS, but when > I use > > “bin/hdfs dfs -cat” or download files from the HDFS website, some garble > appeared, and it looks like this: > > > > \D1 \D3h\91\B59\DFA@\92\BA\E1P > \00 VERSION \00\00\00 \00 APPLICATION_ACL$\00 VIEW_APP\00 root \00 > > MODIFY_APP\00 root > \00 APPLICATION_OWNER \00 root(\00&container_1525851594379_0001_01_000003 > \00 stderr\00 0\00 stdout\00 0\00 \00\00 \00 > > \00 VERSION*(\00&container_1525851594379_0001_01_000003 none ̡̡ > data:BCFile.index none\CC\ED data:TFile.index none̷66 data:TFile.meta none̱ > \00\00\00\00\00\00\00\F8\00 \00\00\D1 \D3h\91\B59\DFA@\92\BA\E1P > > > What can I do to fix this? > > > > Thanks in advance! --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
