[HDFS-13889] The hadoop3.x client have compatible problem with hadoop2.x cluster

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Duplicate
• Component/s: hdfs
• Assignee: Unassigned
• Reporter: luhuachao
• Created: 03/Sep/18 11:46
• Updated: 04/Sep/18 13:22
• Resolved: 04/Sep/18 13:22

Description

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?

Issue Links

• is duplicated by: HDFS-12920 HDFS default value change (with adding time unit) breaks old version MR tarball work with Hadoop 3.x