場景

集群版本：CDH 6.0.1

服務器版本：Centos 7.3

JAVA版本：1.8

異常出現原因

搭建集群中遇到異常，刪除agent節點，重新部署CM后發現異常，CDH處于無法使用狀態

異常

查看agent日志會出現,說無法連接到服務端7182端口，排查防火墻等問題，均正常

Heartbeating to xxxx:7182 failed.

?繼續往下看日志，提示我們獲取的guid不同

[15/Oct/2019 14:46:11 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:16 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:21 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:26 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:31 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:36 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:41 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:46 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:51 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:46:56 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:47:01 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6 [15/Oct/2019 14:47:06 +0000] 4516 MainThread agent ERROR Error, CM server guid updated, expected 8115403a-7f9c-463f-b6d4-45fed899215b, received 87bf3025-6565-4a83-851b-81cdcaa936b6

?解決方法

1.查找cm的guid存放目錄，發現在這個位置?/var/lib/cloudera-scm-agent/cm_guid

[root@xxx cloudera-scm-server]# find / -name *cm_guid* /var/lib/cloudera-scm-agent/cm_guid

?2.查看內容，發現就是上面提示的811xxx，（查看文件時間，是之前搭建的時間）

cat /var/lib/cloudera-scm-agent/cm_guid 8115403a-7f9c-463f-b6d4-45fed899215b

3.停止agent節點后，刪除cm_guid，并啟動agent節點

systemctl stop cloudera-scm-agent #這里等幾秒，服務停止后再刪除 systemctl status cloudera-scm-agent rm -f /var/lib/cloudera-scm-agent/cm_guid systemctl start cloudera-scm-agent

4.查看agent日志，一切正常

5.登錄CM，分配CDH，一切正常。

總結

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