EAGAIN - Resource temporarily unavailable

root@linuxfix:~/eagain$

EAGAIN

Resource temporarily unavailable

Solutions

Prerequisites: Start by updating your system to resolve common issues and ensure the solutions provided below are compatible with your current environment.

check_latest_version && sudo apt update && sudo apt upgrade -y

Check system limits

Verify and adjust resource limits:

ulimit -a

cat /proc/sys/kernel/pid_max

ps aux | wc -l

Implement retry logic

Add retry mechanisms in applications:

sleep 1 && retry_command

while ! command; do sleep 1; done

Increase system limits

Modify system resource limits:

ulimit -n 4096

echo "* soft nofile 4096" >> /etc/security/limits.conf

What is EAGAIN?

EAGAIN indicates that a resource is temporarily unavailable, often seen with non-blocking operations or when system resources are exhausted.

Common scenarios: Non-blocking I/O operations, process/thread limits reached, or temporary resource exhaustion.

Common Causes

System resource limits reached
Too many processes or threads
Non-blocking operation would block
Temporary kernel resource shortage
Network socket buffer full

Debugging Tips

ps aux | head -20

cat /proc/loadavg

free -h

netstat -an | grep TIME_WAIT | wc -l

Prevention

Monitor system resource usage
Implement proper error handling
Set appropriate resource limits
Use connection pooling

Additional Resources

Linux Resource Limits

Understanding ulimit and system limits

errno resources limits performance