Timeout pattern in Microservices - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set a timeout for a microservice call.

Microservices

response = service.call(request, timeout=[1])

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

A5s

B5

C5000ms

Dtimeout

Attempts:

3 left

💡 Hint

Common Mistakes

Using just '5' without units may cause errors.

Using variable names instead of actual timeout values.

The timeout value should be specified as an integer representing milliseconds. Here, '5' is ambiguous, but typically timeout values are integers like 5000 for 5 seconds. '5000ms' as a string may not be accepted by all APIs.

2fill in blank

medium

Complete the code to handle a timeout exception in a microservice call.

Microservices

try:
    response = service.call(request, timeout=3000)
except [1]:
    handle_timeout()

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

AServiceUnavailable

BConnectionError

CTimeoutError

DValueError

Attempts:

3 left

💡 Hint

Common Mistakes

Catching unrelated exceptions like ValueError.

Not catching any exception leading to crashes.

The correct exception to catch when a timeout occurs is usually 'TimeoutError'.

3fill in blank

hard

Fix the error in the timeout retry logic code.

Microservices

for attempt in range(3):
    try:
        response = service.call(request, timeout=2000)
        break
    except [1]:
        if attempt == 2:
            raise
        wait_before_retry()

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

ATimeoutException

BTimeoutExpired

CTimeout

DTimeoutError

Attempts:

3 left

💡 Hint

Common Mistakes

Using non-existent exception names.

Not breaking the loop on success.

The correct exception to catch for timeouts is 'TimeoutError'. Other names may not be recognized and cause runtime errors.

4fill in blank

hard

Fill both blanks to implement a timeout pattern with fallback and logging.

Microservices

try:
    response = service.call(request, timeout=[1])
except [2]:
    log_timeout()
    response = fallback_service.call(request)

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

A3000

BTimeoutError

C5000

DConnectionError

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong exception types.

Setting timeout as a string instead of number.

The timeout is set to 3000 milliseconds and the exception caught is TimeoutError to handle timeout cases properly.

5fill in blank

hard

Fill all three blanks to create a timeout pattern with retry, timeout value, and exception handling.

Microservices

for i in range([1]):
    try:
        response = service.call(request, timeout=[2])
        break
    except [3]:
        if i == [1] - 1:
            raise
        wait_before_retry()

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

A3

B2000

CTimeoutError

D5

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong exception names.

Incorrect retry count or timeout values.

The code retries 3 times with a 2000 ms timeout and catches TimeoutError to handle timeout exceptions properly.