Old logs getting deleted instead of being copied to a new file.
Problem: Log4J's DailiyRollingFileAppender on Windows can truncate log files instead of creating backups during the daily rollover.
Workaround: Reconfigure log4j.properties to use a different appender.
File upload fails to upload in NFS-MountDir.
Problem: While uploading files to NFS-MountDir, the following error is reported in the DataNode log file:
INFO org.apache.hadoop.hdfs.nfs.nfs3.OpenFileCtx: requesed offset=4980736 and current filesize=0
Workaround: On some environments, especially for virtualized environments, copying large files of size close to 1GB fails intermittently. This issue is expected to be addressed in the upcoming release.
Do not use init.d scripts for starting or stopping Hadoop services. It is not recommended.
