Error: SDR Error (ConnectTimeoutException) SDR Error (SDR not reachable) in HCX OSAM

Products

• VMware HCX

Issue/Introduction

• HCX OS-Assisted Migration (OSAM) fails during the continuous sync stage with the error: Initial Sync Failed - SDR Error (ConnectTimeoutException) SDR Error (SDR not reachable)
• Log lines similar to the below are encountered on the HCX Manager in /common/logs/admin/app.log

<timestamp> UTC [OsAssistedReplicationService_SvcThread-45489, Ent: DEFAULT, , TxId: 407a4ee9-####-####-####-#########] ERROR c.v.v.h.s.o.jobs.DeleteReceiverJob- [transferId:'5e9e72d3-####-####-####-#########' sid:'0087e73f-####-####-####-#########' jobId:'051914e8-####-####-####-#########' hostname:'example.com'] SDR Error (SDR not reachable)
com.vmware.vchs.hybridity.service.os_assisted_replication.adapters.ApplianceConnectionTimeoutException: SDR Error (ConnectTimeoutException)

Environment

VMware HCX 4.x

Cause

This issue occurs due to a 120-second communication timeout in the Sentinel agent . If network maintenance or firewall changes interrupt connectivity for more than 120 seconds, the replication task fails.

Resolution

This is a condition that may occur in a VMware HCX environment.

Workaround: 

1. Cancel the migration task in the HCX UI.
2. Re-add the VM to a new Mobility Group to initiate a new replication task.

Additional Information

For steps on retrieving logs, refer to the HCX Log Collection documentation. For general support queries, see Contact Broadcom Support.