Risolvere i problemi relativi allo stack DCS

In questo articolo vengono fornite le operazioni di risoluzione dei problemi per valutare, gestire e monitorare lo stato dello stack DCS.

Questi passaggi aiutano a identificare i problemi a livello di servizio all'interno dello stack DCS e aiutano a ripristinare il normale funzionamento.

Controllare, arrestare e avviare i servizi DCS

  1. Elenca i pacchetti RPM installati per i servizi DCS.

    rpm -qa --last | egrep "dcs|mysql|zoo"

    Esempio:

    [root@test ~]$ rpm -qa --last | egrep "dcs|mysql|zoo"
dcs-agent-25.4.1.0.0_251008.0630-4.x86_64     Mon Nov 24 00:00:32 2025
dcs-admin-25.4.1.0.0_251008.0630-1.x86_64     Sat Nov 22 04:03:02 2025
mysql-8.0.44_el7-8.0.44.x86_64                Sat Nov 22 00:00:29 2025
zookeeper-3.9.3-1.x86_64                      Thu Feb 27 00:05:21 2025
dcs-cli-24.2.1.0.0_240524.1355-1.x86_64       Tue Jun  4 05:40:19 2024

  2. Controllare, arrestare, avviare e riavviare il servizio Agente DCS.

    1. Elenca lo stato dei servizi stack DCS.

      systemctl --state=running|egrep -i "dcs|mysql|zoo|tfa"

      Esempio:

      [root@test ~]# systemctl --state=running|egrep -i "dcs|mysql|zoo|tfa"
initdcsadmin.service     loaded active running Oracle dcs-admin startup
initdcsagent.service     loaded active running Oracle dcs-agent startup
mysqld.service           loaded active running MySQL Server
oracle-tfa.service       loaded active running Oracle Trace File Analyzer

    2. Elenca tutti i processi in ascolto sulle porte designate DCS.

      sudo lsof -nP -iTCP -sTCP:LISTEN | grep -E ':(7060|7070|3306)\b'

      Esempio:

      [root@test ~]# sudo lsof -nP -iTCP -sTCP:LISTEN | grep -E ':(7060|7070|3306)\b'
java    63835   root  403u  IPv4 3563681668    0t0  TCP *:7070 (LISTEN)
mysqld  76121  mysql  120u  IPv4 1268462598    0t0  TCP 127.0.0.1:3306 (LISTEN)
java    76285   root  383u  IPv4 3563956774    0t0  TCP *:7060 (LISTEN)

    3. Verificare lo stato dell'agente DCS utilizzando dbcli.

      dbcli ping-agent

      Esempio:

      [root@test ~]# dbcli ping-agent
Agent is ready to serve the requests.

    4. Controllare, arrestare, avviare e riavviare il servizio MySQL.

      systemctl status mysqld
systemctl stop mysqld
systemctl start mysqld
systemctl restart mysqld

      Esempio:

      [root@test ~]# systemctl status mysqld
mysqld.service - MySQL Server
   Loaded: loaded (/etc/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2025-11-22 00:00:37 UTC; 3 months 4 days ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
 Main PID: 76121 (mysqld)
   Status: "Server is operational"
    Tasks: 36 (limit: 79998)
   Memory: 218.0M
   CGroup: /system.slice/mysqld.service
           76121 /opt/oracle/mysql_compact/mysql/bin/mysqld
                --defaults-file=/opt/oracle/mysql_compact/my.sim.cnf

Warning: Journal has been rotated since unit was started.
Log output is incomplete or unavailable.

[root@test ~]# systemctl stop mysqld
[root@test ~]# systemctl status mysqld
mysqld.service - MySQL Server
   Loaded: loaded (/etc/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: inactive (dead) since Thu 2026-02-26 01:22:51 UTC; 3s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
  Process: 76121 ExecStart=/opt/oracle/mysql_compact/mysql/bin/mysqld
                --defaults-file=/opt/oracle/mysql_compact/my.sim.cnf
                $MYSQLD_OPTS (code=exited, status=0/SUCCESS)
 Main PID: 76121 (code=exited, status=0/SUCCESS)
   Status: "Server shutdown complete"

Feb 26 01:22:47 test systemd[1]: Stopping MySQL Server...
Feb 26 01:22:51 test systemd[1]: mysqld.service: Succeeded.
Feb 26 01:22:51 test systemd[1]: Stopped MySQL Server.
Warning: Journal has been rotated since unit was started.
Log output is incomplete or unavailable.

[root@test ~]# systemctl start mysqld
[root@test ~]# systemctl status mysqld
mysqld.service - MySQL Server
   Loaded: loaded (/etc/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2026-02-26 01:23:02 UTC; 3s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
 Main PID: 86644 (mysqld)
   Status: "Server is operational"
    Tasks: 33 (limit: 79998)
   Memory: 111.7M
   CGroup: /system.slice/mysqld.service
           86644 /opt/oracle/mysql_compact/mysql/bin/mysqld
                --defaults-file=/opt/oracle/mysql_compact/my.sim.cnf

Feb 26 01:23:01 test systemd[1]: Starting MySQL Server...
Feb 26 01:23:02 test systemd[1]: Started MySQL Server.

[root@test ~]# systemctl restart mysqld
[root@test ~]# systemctl status mysqld
mysqld.service - MySQL Server
   Loaded: loaded (/etc/systemd/system/mysqld.service; enabled; vendor preset: disabled)
   Active: active (running) since Thu 2026-02-26 01:23:14 UTC; 2s ago
     Docs: man:mysqld(8)
           http://dev.mysql.com/doc/refman/en/using-systemd.html
 Main PID: 86821 (mysqld)
   Status: "Server is operational"
    Tasks: 33 (limit: 79998)
   Memory: 107.5M
   CGroup: /system.slice/mysqld.service
           86821 /opt/oracle/mysql_compact/mysql/bin/mysqld
                --defaults-file=/opt/oracle/mysql_compact/my.sim.cnf

Feb 26 01:23:13 test systemd[1]: Starting MySQL Server...
Feb 26 01:23:14 test systemd[1]: Started MySQL Server.

    5. Controllare, arrestare, avviare e riavviare il servizio Agente DCS.

      systemctl status initdcsagent
systemctl stop initdcsagent
systemctl start initdcsagent
systemctl restart initdcsagent

      Esempio:

      [root@test ~]# systemctl status initdcsagent
initdcsagent.service - Oracle dcs-agent startup
   Loaded: loaded (/etc/systemd/system/initdcsagent.service; enabled; vendor preset: disabled)
   Active: active (running) since Mon 2025-11-24 00:00:50 UTC; 3 months 2 days ago
 Main PID: 7956 (sh)
    Tasks: 1353 (limit: 79998)
   Memory: 21.5G
   CGroup: /system.slice/initdcsagent.service
           7956 /bin/sh -c . /opt/oracle/dcs/bin/setupJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDum>
           7958 /opt/oracle/dcs/java/dcs-agent/jdk-11.0.29/bin/java
        -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDu>

Feb 25 18:30:02 test su[27582]: pam_unix(su:session): session closed for user oracle
Feb 25 18:30:03 test su[27690]: (to oracle) root on none
Feb 25 18:30:03 test su[27690]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 18:30:03 test su[27690]: pam_unix(su:session): session closed for user oracle
Feb 25 18:30:03 test su[27694]: (to oracle) root on none
Feb 25 18:30:03 test su[27694]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 18:30:03 test su[27694]: pam_unix(su:session): session closed for user oracle
Feb 25 18:30:03 test su[27752]: (to oracle) root on none
Feb 25 18:30:03 test su[27752]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 18:30:04 test su[27752]: pam_unix(su:session): session closed for user oracle

[root@test ~]# systemctl stop initdcsagent
[root@test ~]# systemctl status initdcsagent
initdcsagent.service - Oracle dcs-agent startup
   Loaded: loaded (/etc/systemd/system/initdcsagent.service; enabled; vendor preset: disabled)
   Active: inactive (dead) since Wed 2026-02-25 19:09:22 UTC; 11s ago
  Process: 7956 ExecStart=/bin/sh -c . /opt/oracle/dcs/bin/setupJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX>
 Main PID: 7956 (code=killed, signal=TERM)

Feb 25 19:05:10 test su[58800]: pam_unix(su:session): session closed for user grid
Feb 25 19:05:10 test su[58839]: (to grid) root on none
Feb 25 19:05:10 test su[58839]: pam_unix(su:session): session opened for user grid by (uid=0)
Feb 25 19:05:10 test su[58839]: pam_unix(su:session): session closed for user grid
Feb 25 19:05:15 test su[59381]: (to grid) root on none
Feb 25 19:05:15 test su[59381]: pam_unix(su:session): session opened for user grid by (uid=0)
Feb 25 19:05:15 test su[59381]: pam_unix(su:session): session closed for user grid
Feb 25 19:09:21 test systemd[1]: Stopping Oracle dcs-agent startup...
Feb 25 19:09:22 test systemd[1]: initdcsagent.service: Succeeded.
Feb 25 19:09:22 test systemd[1]: Stopped Oracle dcs-agent startup.

[root@test ~]# systemctl start initdcsagent
[root@test ~]# systemctl status initdcsagent
initdcsagent.service - Oracle dcs-agent startup
   Loaded: loaded (/etc/systemd/system/initdcsagent.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2026-02-25 19:09:51 UTC; 4s ago
 Main PID: 62798 (sh)
    Tasks: 1268 (limit: 79998)
   Memory: 20.2G
   CGroup: /system.slice/initdcsagent.service
           62798 /bin/sh -c . /opt/oracle/dcs/bin/setupJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDu>
           62799 /opt/oracle/dcs/java/dcs-agent/jdk-11.0.29/bin/java
        -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapD>

Feb 25 19:09:51 test systemd[1]: Started Oracle dcs-agent startup.

[root@test ~]# systemctl restart initdcsagent
[root@test ~]# systemctl status initdcsagent
initdcsagent.service - Oracle dcs-agent startup
   Loaded: loaded (/etc/systemd/system/initdcsagent.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2026-02-25 19:10:09 UTC; 11s ago
 Main PID: 63834 (sh)
    Tasks: 1192 (limit: 79998)
   Memory: 20.2G
   CGroup: /system.slice/initdcsagent.service
           63834 /bin/sh -c . /opt/oracle/dcs/bin/setupJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDu>
           63835 /opt/oracle/dcs/java/dcs-agent/jdk-11.0.29/bin/java -Xms128m -Xmx512m
        -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+HeapDumpOnOutOfMemoryError -XX:HeapD>

Feb 25 19:10:16 test su[64523]: pam_unix(su:session): session closed for user oracle
Feb 25 19:10:17 test su[64648]: (to oracle) root on none
Feb 25 19:10:17 test su[64648]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 19:10:17 test su[64648]: pam_unix(su:session): session closed for user oracle
Feb 25 19:10:17 test su[64652]: (to oracle) root on none
Feb 25 19:10:17 test su[64652]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 19:10:17 test su[64652]: pam_unix(su:session): session closed for user oracle
Feb 25 19:10:17 test su[64865]: (to oracle) root on none
Feb 25 19:10:17 test su[64865]: pam_unix(su:session): session opened for user oracle by (uid=0)
Feb 25 19:10:18 test su[64865]: pam_unix(su:session): session closed for user oracle

    6. Controllare, arrestare, avviare e riavviare il servizio di amministrazione DCS.

      systemctl status initdcsadmin
systemctl stop initdcsadmin
systemctl start initdcsadmin
systemctl restart initdcsadmin

      Esempio:

      [root@test ~]# systemctl status initdcsadmin
initdcsadmin.service - Oracle dcs-admin startup
   Loaded: loaded (/etc/systemd/system/initdcsadmin.service; enabled; vendor preset: disabled)
   Active: active (running) since Sat 2025-11-22 03:17:28 UTC; 3 months 4 days ago
 Main PID: 48268 (sh)
   Tasks: 313 (limit: 79998)
   Memory: 1.0G
   CGroup: /system.slice/initdcsadmin.service
           48268 /bin/sh -c . /opt/oracle/dcs/bin/setupAdminJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGC>
           48269 /opt/oracle/dcs/java/dcs-admin/jdk-11.0.29/bin/java -Xms128m -Xmx512m
        -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGCThre>

Feb 25 11:13:58 test su[50418]: (to mysql) root on none
Feb 25 11:13:58 test su[50418]: pam_unix(su:session): session opened for user mysql by (uid=0)
Feb 25 11:13:58 test su[50418]: pam_unix(su:session): session closed for user mysql
Feb 25 17:13:59 test su[62504]: (to mysql) root on none
Feb 25 17:13:59 test su[62504]: pam_unix(su:session): session opened for user mysql by (uid=0)
Feb 25 17:13:59 test su[62504]: pam_unix(su:session): session closed for user mysql
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

[root@test ~]# systemctl stop initdcsadmin
[root@test ~]# systemctl status initdcsadmin
initdcsadmin.service - Oracle dcs-admin startup
 Loaded: loaded (/etc/systemd/system/initdcsadmin.service; enabled; vendor preset: disabled)
 Active: inactive (dead) since Wed 2026-02-25 19:21:44 UTC; 1s ago
 Process: 48268 ExecStart=/bin/sh -c . /opt/oracle/dcs/bin/setupAdminJre.sh;
    $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
    -XX:+DisableExplicitGC -XX:Pa>
 Main PID: 48268 (code=killed, signal=TERM)

Feb 25 11:13:58 test su[50418]: (to mysql) root on none
Feb 25 11:13:58 test su[50418]: pam_unix(su:session): session opened for user mysql by (uid=0)
Feb 25 11:13:58 test su[50418]: pam_unix(su:session): session closed for user mysql
Feb 25 17:13:59 test su[62504]: (to mysql) root on none
Feb 25 17:13:59 test su[62504]: pam_unix(su:session): session opened for user mysql by (uid=0)
Feb 25 17:13:59 test su[62504]: pam_unix(su:session): session closed for user mysql
Feb 25 19:21:43 test systemd[1]: Stopping Oracle dcs-admin startup...
Feb 25 19:21:44 test systemd[1]: initdcsadmin.service: Succeeded.
Feb 25 19:21:44 test systemd[1]: Stopped Oracle dcs-admin startup.
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.

[root@test ~]# systemctl start initdcsadmin
[root@test ~]# systemctl status initdcsadmin
initdcsadmin.service - Oracle dcs-admin startup
   Loaded: loaded (/etc/systemd/system/initdcsadmin.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2026-02-25 19:23:00 UTC; 2s ago
 Main PID: 75371 (sh)
    Tasks: 162 (limit: 79998)
   Memory: 226.0M
   CGroup: /system.slice/initdcsadmin.service
           75371 /bin/sh -c . /opt/oracle/dcs/bin/setupAdminJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGC>
           75372 /opt/oracle/dcs/java/dcs-admin/jdk-11.0.29/bin/java -Xms128m -Xmx512m
        -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGCThre>

Feb 25 19:23:00 test systemd[1]: Started Oracle dcs-admin startup.

[root@test ~]# systemctl restart  initdcsadmin
[root@test ~]# systemctl status initdcsadmin
initdcsadmin.service - Oracle dcs-admin startup
   Loaded: loaded (/etc/systemd/system/initdcsadmin.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2026-02-25 19:24:06 UTC; 2s ago
 Main PID: 76284 (sh)
    Tasks: 161 (limit: 79998)
   Memory: 226.9M
   CGroup: /system.slice/initdcsadmin.service
           76284 /bin/sh -c . /opt/oracle/dcs/bin/setupAdminJre.sh;
        $JAVA -Xms128m -Xmx512m -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGC>
           76285 /opt/oracle/dcs/java/dcs-admin/jdk-11.0.29/bin/java -Xms128m -Xmx512m
        -XX:MetaspaceSize=128m -XX:MaxMetaspaceSize=512m
        -XX:+DisableExplicitGC -XX:ParallelGCThre>

Feb 25 19:24:06 test systemd[1]: Started Oracle dcs-admin startup.

    7. Controllare, arrestare, avviare e riavviare il servizio ZooKeeper.

      /opt/zookeeper/bin/zkServer.sh status
/opt/zookeeper/bin/zkServer.sh stop
/opt/zookeeper/bin/zkServer.sh start

      Esempio:

      [root@test ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: follower

[root@test ~]# /opt/zookeeper/bin/zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Stopping zookeeper ... STOPPED

[root@test ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Error contacting service. It is probably not running.

[root@test ~]# /opt/zookeeper/bin/zkServer.sh start
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED

[root@test ~]# /opt/zookeeper/bin/zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/bin/../conf/zoo.cfg
Mode: follower

Visualizza dettagli sistema DB

  1. Visualizza i dettagli del sistema DB.

    /opt/oracle/dcs/bin/dbcli describe-system -d

    Esempio:

    [root@test ~]# /opt/oracle/dcs/bin/dbcli describe-system -d

DbSystem Information
----------------------------------------------------------------
                     ID: 444b444e-c4c4-4fd4-44er-4444ag44444
               Platform: Vmdb
        Data Disk Count: 12
         CPU Core Count: 32
                Created: September 28, 2025 at 9:05:22 PM UTC

System Information
----------------------------------------------------------------
                   Name: test1te
            Domain Name: testpublicsu.testvcn.oraclevcn.com
              Time Zone: UTC
             DB Edition: EeHp
            DNS Servers:
            NTP Servers: 100.200.100.200

Disk Group Information
----------------------------------------------------------------
DG Name                   Redundancy                Percentage
------------------------- ------------------------- ------------
Data                      External                  100
Reco                      External                  100

DcsCli Details
----------------------------------------------------------------
                Version:
            BuildNumber: 2.0.16
              GitNumber:
              BuildTime:

DcsAgent Details
----------------------------------------------------------------
                Version: 25.4.1.0.0-SNAPSHOT
            BuildNumber: 4
              GitNumber: f2f63fd7ra9bf53a
              BuildTime:

DcsAdmin Details
----------------------------------------------------------------
                Version: 25.4.1.0.0-SNAPSHOT
            BuildNumber: 25.4.1.0.0-SNAPSHOT_4
              GitNumber: f2f6edac4a9bf53a
              BuildTime:

Nota: