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https://issues.apache.org/jira/browse/HDFS-13889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee resolved HDFS-13889.
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Resolution: Duplicate
> The hadoop3.x client have compatible problem with hadoop2.x cluster
> -------------------------------------------------------------------
>
> Key: HDFS-13889
> URL: https://issues.apache.org/jira/browse/HDFS-13889
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: hdfs
> Reporter: luhuachao
> Priority: Critical
>
> when use hadoop3.1.0 client submit a mapreduce job to the hadoop2.8.2
> cluster,the appmaster will fail with 'java.lang.NumberFormatException: For
> input string: "30s"' on config dfs.client.datanode-restart.timeout; As in
> hadoop3.x hdfs-default.xml "dfs.client.datanode-restart.timeout" was set to
> value "30s" , and in hadoop2.x, DfsClientConf.java use Method getLong to get
> this value. Is it necessary to fix this problem?
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