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chen liang <cliang@apache.org> in hadoop

HDFS-14509. DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x. Contributed by Yuxuan Wang and Konstantin Shvachko.

HDFS-14509. DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x. Contributed by Yuxuan Wang and Konstantin Shvachko.

(cherry picked from commit 72ae371e7a6695f45f0d9cea5ae9aae83941d360)

HDFS-14509. DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x. Contributed by Yuxuan Wang and Konstantin Shvachko.

HDFS-14509. DN throws InvalidToken due to inequality of password when upgrade NN 2.x to 3.x. Contributed by Yuxuan Wang and Konstantin Shvachko.

(cherry picked from commit 72ae371e7a6695f45f0d9cea5ae9aae83941d360)

HDFS-12979. StandbyNode should upload FsImage to ObserverNode after checkpointing. Contributed by Chen Liang.

HDFS-14858. [SBN read] Allow configurably enable/disable AlignmentContext on NameNode. Contributed by Chen Liang.

HDFS-14858. [SBN read] Allow configurably enable/disable AlignmentContext on NameNode. Contributed by Chen Liang.

HDFS-14858. [SBN read] Allow configurably enable/disable AlignmentContext on NameNode. Contributed by Chen Liang.

HDFS-14858. [SBN read] Allow configurably enable/disable AlignmentContext on NameNode. Contributed by Chen Liang.

HDFS-14785. [SBN read] Change client logging to be less aggressive. Contributed by Chen Liang.

HDFS-14785. [SBN read] Change client logging to be less aggressive. Contributed by Chen Liang.

HDFS-14785. [SBN read] Change client logging to be less aggressive. Contributed by Chen Liang.

HDFS-14785. [SBN read] Change client logging to be less aggressive. Contributed by Chen Liang.

HDFS-14822. [SBN read] Revisit GlobalStateIdContext locking when getting server state id. Contributed by Chen Liang.

HDFS-14822. [SBN read] Revisit GlobalStateIdContext locking when getting server state id. Contributed by Chen Liang.

HDFS-14822. [SBN read] Revisit GlobalStateIdContext locking when getting server state id. Contributed by Chen Liang.

HDFS-14822. [SBN read] Revisit GlobalStateIdContext locking when getting server state id. Contributed by Chen Liang.

HDFS-14611. Move handshake secret field from Token to BlockAccessToken. Contributed by Chen Liang

HDFS-14726. Fix JN incompatibility issue in branch-2 due to backport of HDFS-10519. Contributed by Chen Liang.

HDFS-13977. NameNode can kill itself if it tries to send too many txns to a QJM simultaneously. Contributed by Erik Krogen.

HDFS-14674. [SBN read] Got an unexpected txid when tail editlog. Contributed by wangzhaohui.

HDFS-14674. [SBN read] Got an unexpected txid when tail editlog. Contributed by wangzhaohui.

HDFS-14674. [SBN read] Got an unexpected txid when tail editlog. Contributed by wangzhaohui.

Fix JDK7 compatibility in branch-2.

HDFS-13898 Addendum: add a missing test helper method

[SBN read] Addendum: Misc fix of issues, javadoc, whitespace unused backported fields etc

[SBN read] Addendum: Misc fix to be Java 7 compatible

HDFS-12979. [SBN read] StandbyNode should upload FsImage to ObserverNode after checkpointing. Contributed by Chen Liang.

HDFS-12979. [SBN read] StandbyNode should upload FsImage to ObserverNode after checkpointing. Contributed by Chen Liang.

HDFS-12979. [SBN read] StandbyNode should upload FsImage to ObserverNode after checkpointing. Contributed by Chen Liang.