Learn how to fix the SSL SYSCALL Error EOF detected in HAproxy. Our HAproxy Support team is here to help you with your questions and concerns.

SSL SYSCALL Error EOF detected HAproxy | Resolved

If you have been running into the following error, our experts are here to help you out:

SSL SYSCALL error: EOF detected

According to our experts, this error occurs when the system runs out of available memory.

In some cases, we also run into this error if the database times out when reading or writing large files.
In other words, the lower our system memory, the longer it’ll take to run each query, and the probability of a connection timeout goes up as well.

There are two ways to resolve this error.

Method 1: Add more memory

The foremost way to fix the error is to make sure that our system has enough memory to handle the workload.

If we cannot physically upgrade the RAM or we run Postgres on a shared cloud hosting server we can free up memory by stopping non-essential background processes.

Method 2: Change the Connection Timeout Duration

If we cannot increase the system memory, we can try adjusting the connection timeout settings to give Postgres more time before starting a timeout.

Although this will not fix the root problem, it will prevent our queries from being stopped mid-execution.

We can modify these parameters to customize the connection timeout:

• keepalives

  This boolean value decides if we want to use client-side keepalives.
• keepalives_idle

  This is the number of seconds of inactivity before a keepalive request is sent out by the system.
• keepalives_interval

  It sets the number of seconds the system waits before resending a request if it hasn’t been acknowledged.
• keepalives_count

  This parameter controls how many unacknowledged keepalives are needed to consider the connection dead.

Once we adjust these parameters, we tell Postgres to be more patient and persistent when dealing with memory-hungry operations.

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Conclusion

In brief, our Support Experts demonstrated how to fix the “SSL SYSCALL Error EOF detected” in HAproxy