C_CPI Integration Suite Development Practice Question
An integration developer is troubleshooting a Cloud Integration flow that intermittently fails with a 'Message processing failed: Unable to acquire a connection from the connection pool' error. The flow uses an HTTP receiver adapter to call an external system. The external system is known to have variable response times. Which action should the developer take to resolve this issue?
⚠ Common exam trap
The trap here is thinking that a longer timeout will solve a pool exhaustion error, when it actually just delays the failure.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Increase the maximum number of connections in the connection pool for the HTTP receiver adapter
The error indicates that the connection pool has no available connections when a request needs one. This happens when the number of concurrent requests exceeds the pool's maximum size, especially if the external system responds slowly and holds connections. Increasing the maximum pool size directly provides more connections, resolving the exhaustion. Other options either do not address the pool limit or reduce performance without fixing the root cause.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Increase the maximum number of connections in the connection pool for the HTTP receiver adapter
Why this is correct
The error 'Unable to acquire a connection from the connection pool' means all connections in the pool are in use and the request timed out waiting for one. Increasing the maximum pool size allows more concurrent connections, which can alleviate the exhaustion when the external system has variable response times and holds connections longer. This directly addresses the root cause.
- ✗
Enable the 'Use Keep-Alive' option in the HTTP receiver adapter
Why it's wrong here
Keep-Alive allows connections to be reused, which can improve performance, but if the pool is already exhausted, enabling Keep-Alive does not increase the number of available connections. It may help reduce the rate of new connection creation, but it does not solve the immediate exhaustion when many concurrent requests are in flight.
- ✗
Increase the connection timeout value in the HTTP receiver adapter
Why it's wrong here
Increasing the connection timeout may help if the issue is that connections are timing out while waiting to be established, but the error indicates the pool is exhausted. A longer timeout would not create more connections; it would only make the flow wait longer, potentially worsening the exhaustion. The root cause is likely too many concurrent requests relative to the pool size.
- ✗
Reduce the number of concurrent threads processing messages in the integration flow
Why it's wrong here
Reducing concurrency would lower the demand for connections, but it would also reduce throughput and may not be acceptable. The error is caused by insufficient pool size relative to the load; reducing load is a workaround, not a fix. The better solution is to increase the pool size to handle the legitimate concurrent requests.
Visual reference
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official SAP exam blueprint
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