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  6. ALM-25004 Abnormal LdapServer Data Synchronization

ALM-25004 Abnormal LdapServer Data Synchronization

Description

This alarm is generated when LdapServer data on Manager is inconsistent or LdapServer data is different between LdapServer and Manager. It is cleared when the data becomes consistent.

Attribute

Alarm ID

Alarm Severity

Automatically Cleared

25004

Critical

Yes

Parameters

Parameter

Description

ServiceName

Specifies the service for which the alarm is generated.

RoleName

Specifies the role for which the alarm is generated.

HostName

Specifies the host for which the alarm is generated.

Impact on the System

LdapServer data inconsistency occurs because LdapServer data on Manager or in the cluster is damaged. The LdapServer process with damaged data cannot provide services externally, and the authentication functions of Manager and the cluster are affected.

Possible Causes

  • The network of the node where the LdapServer process locates is faulty.
  • The LdapServer process is abnormal.
  • The OS restart damages data on LdapServer.

Procedure

  1. Check whether the network where the LdapServer nodes reside is faulty.

    1. On MRS Manager, click Alarm. Record the IP address of HostName in Location of the alarm as IP1. If multiple alarms exist, record the IP addresses as IP1, IP2, and IP3.
    2. Contact O&M personnel and log in to the node corresponding to IP1. Run the ping command on the node to check whether the IP address of the management plane of the active OMS node can be pinged.
      • If yes, go to 1.c.
      • If no, go to 2.a.
    3. Contact public cloud O&M personnel to recover the network and check whether alarm ALM-25004 Abnormal LdapServer Data Synchronization is cleared.
      • If yes, no further action is required.
      • If no, go to 2.a.

  2. Check whether the LdapServer process is in the normal state.

    1. On the Alarm page of MRS Manager, check whether alarm ALM-12004 OLdap Resource Is Abnormal is generated.
      • If yes, go to 2.b.
      • If no, go to 2.d.
    2. Rectify the fault by following the steps provided in ALM-12004 OLdap Resource Is Abnormal.
    3. Check whether alarm ALM-25004 Abnormal LdapServer Data Synchronization is cleared.
      • If yes, no further action is required.
      • If no, go to 2.d.
    4. On the Alarm page of MRS Manager, check whether alarm ALM-12007 Process Fault of LdapServer is generated.
      • If yes, go to 2.e.
      • If no, go to 3.a.
    5. Rectify the fault by following the steps provided in ALM-12007 Process Fault.
    6. Check whether alarm ALM-25004 Abnormal LdapServer Data Synchronization is cleared.
      • If yes, no further action is required.
      • If no, go to 3.a.

  3. Check whether the OS restart damages data on LdapServer.

    1. On MRS Manager, click Alarm. Record the IP address of HostName in Location of the alarm as IP1. If multiple alarms exist, record the IP addresses as IP1, IP2, and IP3. Choose Service > LdapServer > Service Configuration, record the LdapServer port number as PORT. If the IP address in the alarm location information is the IP address of the standby OMS node, the port ID is the default port ID 21750.
    2. Log in to the node corresponding to IP1 as user omm and run the ldapsearch -H ldaps://IP1:PORT -x -LLL -b dc=hadoop,dc=com command to check whether errors are displayed in the queried information. If the IP address is that of the standby OMS node, run export LDAPCONF=${CONTROLLER_HOME}/ldapserver/ldapserver/local/conf/ldap.conf before running the preceding command.
    3. Recover the LdapServer and OMS nodes using backup data before the alarm is generated. For details, see section "Recovering Manager Data" in the Administrator Guide.
      NOTE:

      To restore data, use the OMS data and LdapServer data backed up at the same time. Otherwise, the service and operation may fail. To recover data when services are running properly, you are advised to manually back up the latest management data and then recover the data. Otherwise, Manager data produced between the backup and recovery points in time will be lost.

    4. Check whether alarm ALM-25004 Abnormal LdapServer Data Synchronization is cleared.
      • If yes, no further action is required.
      • If no, go to Step 4.

  4. Collect fault information.

    1. On MRS Manager, choose System > Export Log.
    2. Contact technical support engineers for help, detail see technical support.

Related Information

N/A