Horizontal discovery pattern timeout: scan did not complete

MID Server is under-resourced with insufficient CPU, memory, or concurrent thread capacity to handle the discovery workload within the timeout period. (high likelihood)

The IP range being scanned is too large, containing too many addresses for the MID Server to process within the configured discovery timeout. (high likelihood)

Network latency or slow-responding hosts in the target IP range are causing individual probe operations to take longer than expected. (medium likelihood)

Discovery timeout properties are set too low for the scope and complexity of the discovery operation being performed. (medium likelihood)

Network connectivity issues or firewall restrictions are causing connection delays or packet drops during the discovery scan. (low likelihood)

Step 1: Navigate to MID Server > Status and check the MID Server health, CPU usage, and memory consumption to identify resource constraints.

Step 2: Review the Discovery Log at Discovery > Status to identify the specific IP range and pattern that timed out, noting the scan duration and scope.

Step 3: Check the discovery timeout settings by navigating to Discovery > Properties and reviewing properties like glide.discovery.timeout and glide.discovery.horizontal_timeout.

Step 4: Reduce the IP range scope by splitting large ranges into smaller subnets in the Discovery Schedule configuration to decrease per-scan workload.

Step 5: Increase MID Server resources by allocating more CPU cores, RAM, or adjusting the concurrent discovery thread count in the MID Server configuration.

Step 6: Test network connectivity from the MID Server to sample hosts in the target range using ping and port connectivity tests to identify network issues.

Step 7: Consider increasing the discovery timeout values if the current settings are insufficient for the network environment and scan complexity.

Step 8: Monitor subsequent discovery runs through the Discovery Status dashboard to verify that the timeout issues have been resolved.