HDFS-8226. Non-HA rollback compatibility broken (Contributed by J.Andreina)
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@ -755,6 +755,8 @@ Release 2.7.1 - UNRELEASED
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HDFS-7980. Incremental BlockReport will dramatically slow down namenode
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HDFS-7980. Incremental BlockReport will dramatically slow down namenode
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startup. (Walter Su via szetszwo)
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startup. (Walter Su via szetszwo)
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HDFS-8226. Non-HA rollback compatibility broken (J.Andreina via vinayakumarb)
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Release 2.7.0 - 2015-04-20
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Release 2.7.0 - 2015-04-20
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INCOMPATIBLE CHANGES
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INCOMPATIBLE CHANGES
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@ -48,13 +48,14 @@ fi
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# get arguments
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# get arguments
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if [[ $# -ge 1 ]]; then
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if [[ $# -ge 1 ]]; then
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nameStartOpt="$1"
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startOpt="$1"
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shift
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shift
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case "$nameStartOpt" in
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case "$startOpt" in
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-upgrade)
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-upgrade)
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nameStartOpt="$startOpt"
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;;
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;;
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-rollback)
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-rollback)
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dataStartOpt="$nameStartOpt"
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dataStartOpt="$startOpt"
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;;
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;;
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*)
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*)
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hadoop_exit_with_usage 1
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hadoop_exit_with_usage 1
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@ -318,6 +318,8 @@ When Hadoop is upgraded on an existing cluster, as with any software upgrade, it
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* stop the cluster and distribute earlier version of Hadoop.
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* stop the cluster and distribute earlier version of Hadoop.
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* run the rollback command on the namenode (`bin/hdfs namenode -rollback`).
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* start the cluster with rollback option. (`sbin/start-dfs.sh -rollback`).
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* start the cluster with rollback option. (`sbin/start-dfs.sh -rollback`).
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When upgrading to a new version of HDFS, it is necessary to rename or delete any paths that are reserved in the new version of HDFS. If the NameNode encounters a reserved path during upgrade, it will print an error like the following:
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When upgrading to a new version of HDFS, it is necessary to rename or delete any paths that are reserved in the new version of HDFS. If the NameNode encounters a reserved path during upgrade, it will print an error like the following:
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