[ https://issues.apache.org/jira/browse/HDFS-142?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jitendra Nath Pandey updated HDFS-142: -------------------------------------- Attachment: HDFS-142.20-security.1.patch Patch for 20-security branch uploaded. > In 0.20, move blocks being written into a blocksBeingWritten directory > ---------------------------------------------------------------------- > > Key: HDFS-142 > URL: https://issues.apache.org/jira/browse/HDFS-142 > Project: Hadoop HDFS > Issue Type: Bug > Affects Versions: 0.20-append > Reporter: Raghu Angadi > Assignee: dhruba borthakur > Priority: Blocker > Fix For: 0.20-append > > Attachments: HDFS-142-deaddn-fix.patch, HDFS-142-finalize-fix.txt, > HDFS-142-multiple-blocks-datanode-exception.patch, > HDFS-142.20-security.1.patch, HDFS-142_20-append2.patch, HDFS-142_20.patch, > appendFile-recheck-lease.txt, appendQuestions.txt, deleteTmp.patch, > deleteTmp2.patch, deleteTmp5_20.txt, deleteTmp5_20.txt, deleteTmp_0.18.patch, > dont-recover-rwr-when-rbw-available.txt, handleTmp1.patch, > hdfs-142-commitBlockSynchronization-unknown-datanode.txt, > hdfs-142-minidfs-fix-from-409.txt, > hdfs-142-recovery-reassignment-and-bbw-cleanup.txt, hdfs-142-testcases.txt, > hdfs-142-testleaserecovery-fix.txt, recentInvalidateSets-assertion-fix.txt, > recover-rbw-v2.txt, testfileappend4-deaddn.txt, > validateBlockMetaData-synchronized.txt > > > Before 0.18, when Datanode restarts, it deletes files under data-dir/tmp > directory since these files are not valid anymore. But in 0.18 it moves these > files to normal directory incorrectly making them valid blocks. One of the > following would work : > - remove the tmp files during upgrade, or > - if the files under /tmp are in pre-18 format (i.e. no generation), delete > them. > Currently effect of this bug is that, these files end up failing block > verification and eventually get deleted. But cause incorrect over-replication > at the namenode before that. > Also it looks like our policy regd treating files under tmp needs to be > defined better. Right now there are probably one or two more bugs with it. > Dhruba, please file them if you rememeber. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira