gerrit代碼審核工具之“error unpack failed error Missing unknown”錯誤解決思路

使用gerrit代碼審核工具時遇到error: unpack failed: error Missing unknown d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72 fatal: Unpack error, check server log To ssh://192.168.10.201:29418/MainWeb ! [remote rejected] HEAD -> refs/for/test (n/a (unpacker error)) error: failed to push some refs to 'ssh://admin@192.168.10.201:29418/MainWeb'
問題應該如何解決

• 在網上查閱資料，發現有一個共同點就是數據庫里面有提示的這些對象，但是git倉庫里面找不到對應的對象名所以報錯了
• 至於出現這樣的現象可能是因為上次杋器意外掉電，導致倉庫出現了問題
• 解決思路，既然是數據庫中的多余了，刪了是否可靠，覺得可以試試看，因為我們數據庫每天都有備份的

• 錯誤提示如下

➜  MainWeb git:(test) git push --no-thin origin HEAD:refs/for/test
Counting objects: 3, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 645 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
error: unpack failed: error Missing unknown d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72
fatal: Unpack error, check server log
To ssh://192.168.10.201:29418/MainWeb
 ! [remote rejected]   HEAD -> refs/for/test (n/a (unpacker error))
error: failed to push some refs to 'ssh://admin@192.168.10.201:29418/MainWeb'

• 操作步驟

• 提交代碼時出現了這個錯誤，注意關鍵地方，其實也可以一邊操作一邊查看后台日志
  //這里‘error Missing unknown d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72’后面跟的那一串字符，對應數據庫中gerrit_db.patch_sets表中的revision字段，

# git push --no-thin origin HEAD:refs/for/test
Counting objects: 3, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 645 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
error: unpack failed: error Missing unknown d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72
fatal: Unpack error, check server log
To ssh://192.168.10.201:29418/MainWeb
 ! [remote rejected]   HEAD -> refs/for/test (n/a (unpacker error))
error: failed to push some refs to 'ssh://admin@192.168.10.201:29418/MainWeb'

• 通過revision可以查到涉及到這個對象的change_id，如下

mysql> select * from patch_sets where revision = 'd6d7c89bd1d77f44c5c8e99437aaffbfc0684e72'\G
*************************** 1. row ***************************
           revision: d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72
uploader_account_id: 1
         created_on: 2017-01-11 20:47:46
              draft: Y
          change_id: 1176
       patch_set_id: 1
1 row in set (0.00 sec)

• 通過change_id可以查到changes相關的數據

mysql> select * from changes where change_id = 1176 \G
*************************** 1. row ***************************
          change_key: I2c68f2b32537908e55eb19472dea5a418d26b187
          created_on: 2017-01-11 20:47:46
     last_updated_on: 2017-01-11 20:47:46
    owner_account_id: 1
   dest_project_name: MainWeb
    dest_branch_name: refs/meta/config
              status: A
current_patch_set_id: 1
             subject: Edit Project Config
               topic: NULL
    original_subject: Edit Project Config
         row_version: 1
           change_id: 1176
1 row in set (0.00 sec)

• 好了，可以嘗試先將這兩條記錄刪掉，看看報什么錯

mysql> delete from changes where change_id = 1176 ; 
Query OK, 1 row affected (0.00 sec)

mysql> select * from changes where change_id = 1176 \G
Empty set (0.00 sec)

mysql> select * from patch_sets where revision = 'd6d7c89bd1d77f44c5c8e99437aaffbfc0684e72'\G
*************************** 1. row ***************************
           revision: d6d7c89bd1d77f44c5c8e99437aaffbfc0684e72
uploader_account_id: 1
         created_on: 2017-01-11 20:47:46
              draft: Y
          change_id: 1176
       patch_set_id: 1
1 row in set (0.00 sec)

mysql> delete from patch_sets where revision = 'd6d7c89bd1d77f44c5c8e99437aaffbfc0684e72';
Query OK, 1 row affected (0.01 sec)

mysql> select * from patch_sets where revision = 'd6d7c89bd1d77f44c5c8e99437aaffbfc0684e72'\G
Empty set (0.00 sec)

mysql> select * from patch_sets where change_id =  1176;
Empty set (0.00 sec)

• 再提交，看看是否還會報錯

➜  MainWeb git:(test) git push --no-thin origin HEAD:refs/for/test
Counting objects: 3, done.
Delta compression using up to 2 threads.
Compressing objects: 100% (2/2), done.
Writing objects: 100% (3/3), 645 bytes | 0 bytes/s, done.
Total 3 (delta 0), reused 0 (delta 0)
error: unpack failed: error Missing unknown d3b7b1a1b0f1250f7115a1173f7137aae5a0c9aa
fatal: Unpack error, check server log
To ssh://192.168.10.201:29418/MainWeb
 ! [remote rejected]   HEAD -> refs/for/test (n/a (unpacker error))
error: failed to push some refs to 'ssh://admin@192.168.10.201:29418/MainWeb'

• 額，看來還是類似的錯誤，那我就都刪了再看看，操作完看是否可以正常工作了admin賬號

• 還是預期的那樣，把庫的多余的東西刪掉之后就可以正常推送了，push 到遠程倉庫

• 多備份下數據庫還是有必要的，萬一剛剛的操作出問題之后，最起碼還是有后悔葯的。嘿嘿

➜  MainWeb git:(test) git status 
On branch test
Your branch is ahead of 'origin/test' by 1 commit.
  (use "git push" to publish your local commits)
nothing to commit, working tree clean
➜  MainWeb git:(test) git push origin                             
Total 0 (delta 0), reused 0 (delta 0)
remote: Processing changes: closed: 1, refs: 1, done    
To ssh://192.168.10.201:29418/MainWeb
   4017e4bf..dae0d97d  test -> test