Log analysis and troubleshooting in RabbitMQ - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the command to view the last 50 lines of the RabbitMQ log file.

RabbitMQ

tail -n [1] /var/log/rabbitmq/rabbitmq.log

Drag options to blanks, or click blank then click option'

A50

B100

C10

D500

Attempts:

3 left

💡 Hint

Common Mistakes

Using too many lines which makes it hard to find recent errors.

Using too few lines and missing important log entries.

The tail -n 50 command shows the last 50 lines of the log file, which helps to quickly check recent log entries.

2fill in blank

medium

Complete the command to search RabbitMQ logs for the keyword 'error'.

RabbitMQ

grep [1] /var/log/rabbitmq/rabbitmq.log

Drag options to blanks, or click blank then click option'

A'warning'

B'info'

C'error'

D'debug'

Attempts:

3 left

💡 Hint

Common Mistakes

Searching for 'info' or 'debug' which show normal operation messages.

Forgetting to use quotes around the keyword.

The grep 'error' command filters log lines containing the word 'error', helping to find issues quickly.

3fill in blank

hard

Fix the error in the command to continuously monitor RabbitMQ logs.

RabbitMQ

tail -f [1]/rabbitmq.log

Drag options to blanks, or click blank then click option'

A/var/log

B/var/log/rabbitmq

C/etc/rabbitmq

D/usr/local/rabbitmq

Attempts:

3 left

💡 Hint

Common Mistakes

Using the config directory /etc/rabbitmq instead of logs.

Using a wrong or non-existent directory.

The RabbitMQ logs are usually stored in /var/log/rabbitmq. Using this path with tail -f allows live monitoring of the log file.

4fill in blank

hard

Complete the code to create a dictionary comprehension that maps queue names to their message counts from a list of tuples.

RabbitMQ

{queue: count for queue, count in queues if count [1] 0}

Drag options to blanks, or click blank then click option'

A:

B>

C<

D=

Attempts:

3 left

💡 Hint

Common Mistakes

Using '=' instead of ':' in dictionary comprehension.

Using '<' instead of '>' which filters wrong queues.

The colon : separates keys and values in a dictionary comprehension. The condition count > 0 filters queues with messages.

5fill in blank

hard

Fill all three blanks to filter and map log entries with severity 'ERROR' and extract their timestamps.

RabbitMQ

[[1] for line in logs if '[2]' in line and line.startswith('[3]')]

Drag options to blanks, or click blank then click option'

Aline.split()[1]

BERROR

C2024-06-

DINFO

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'INFO' instead of 'ERROR' to filter logs.

Extracting wrong part of the line for timestamp.

This list comprehension extracts the timestamp (second word) from lines containing 'ERROR' and starting with the date prefix '2024-06-'.