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On this page

ZooKeeper Log Overview

Updated on 2023-04-28 GMT+08:00

Log Description

Log path: /var/log/Bigdata/zookeeper/quorumpeer (Run log), /var/log/Bigdata/audit/zookeeper/quorumpeer (Audit log)

Log archive rule: The automatic ZooKeeper log compression function is enabled. By default, when the size of logs exceeds 30 MB, logs are automatically compressed into a log file. A maximum of 20 compressed files can be reserved. The number of compressed files can be configured on Manager.

Table 1 ZooKeeper log list

Log Type

Log File Name

Description

Run logs

zookeeper-<SSH_USER>-<process_name>-<hostname>.log

ZooKeeper system log file, which records most of the logs generated when the ZooKeeper system is running.

check-serviceDetail.log

Log that records whether the ZooKeeper service starts successfully.

zookeeper-<SSH_USER>-<DATA>-<PID>-gc.log

ZooKeeper garbage collection log file

instanceHealthDetail.log

Log that records the health check details of ZooKeeper instance

zookeeper-omm-server-<hostname>.out

Log indicating that ZooKeeper unexpectedly quits

zk-err-<zkpid>.log

ZooKeeper fatal error log

java_pid<zkpid>.hprof

ZooKeeper memory overflow log

funcDetail.log

ZooKeeper instance startup log

zookeeper-period-check.log

Health check log of the ZooKeeper instance

zookeeper-period-check-java.log

ZooKeeper quota monitoring period check log

Audit Log

zk-audit-quorumpeer.log

ZooKeeper operation audit log

Log levels

Table 2 describes the log levels supported by ZooKeeper. The priorities of log levels are FATAL, ERROR, WARN, INFO, and DEBUG in descending order. Logs whose levels are higher than or equal to the specified level are printed. The number of printed logs decreases as the specified log level increases.

Table 2 Log levels

Level

Description

FATAL

Logs of this level record fatal error information about the current event processing that may result in a system crash.

ERROR

Error information about the current event processing, which indicates that system running is abnormal.

WARN

Abnormal information about the current event processing. These abnormalities will not result in system faults.

INFO

Logs of this level record normal running status information about the system and events.

DEBUG

Logs of this level record the system information and system debugging information.

To modify log levels, perform the following operations:

  1. Go to the All Configurations page of the ZooKeeper service by referring to Modifying Cluster Service Configuration Parameters.
  2. On the menu bar on the left, select the log menu of the target role.
  3. Select a desired log level.
  4. Click Save. In the displayed dialog box, click OK to make the configuration take effect.

    NOTE:

    The configurations take effect immediately without the need to restart the service.

Log Format

The following table lists the ZooKeeper log formats.

Table 3 Log Format

Log Type

Component

Format

Example

Run logs

zookeeper

quorumpeer

<yyyy-MM-dd HH:mm:ss,SSS>|<Log level>|<Name of the thread that generates the log>|<Message in the log>|<Location where the log event occurs>

2020-01-20 16:33:43,816 | INFO | main | Defaulting to majority quorums | org.apache.zookeeper.server.quorum.QuorumPeerConfig.parseProperties(QuorumPeerConfig.java:335)

Audit logs

zookeeper

quorumpeer

<yyyy-MM-dd HH:mm:ss,SSS>|<Log level>|<Name of the thread that generates the log>|<Message in the log>|<Location where the log event occurs>

2020-01-20 16:33:54,313 | INFO | CommitProcessor:13 | session=0xd4b0679daea0000 ip=10.177.112.145 operation=create znode target=ZooKeeperServer znode=/zk-write-test-2 result=success | org.apache.zookeeper.ZKAuditLogger$LogLevel$5.printLog(ZKAuditLogger.java:70)

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