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fix(lmxproxy): make MxAccess client name unique per instance

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Multiple instances registering with the same name may cause MxAccess to
conflict on callback routing. ClientName is now configurable via
appsettings.json, defaulting to a GUID-suffixed name if not set.
Instances A and B use "LmxProxy-A" and "LmxProxy-B" respectively.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
This commit is contained in:
Joseph Doherty
2026-03-22 23:17:55 -04:00
parent a59d4ad76c
commit a326a8cbde
5 changed files with 14 additions and 5 deletions
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3
lmxproxy/instances_config.md
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@@ -8,12 +8,13 @@ Two instances of the LmxProxy v2 Host service are deployed on windev (10.100.0.4
|---|---|---|
| **Service Name** | `ZB.MOM.WW.LmxProxy.Host.V2` | `ZB.MOM.WW.LmxProxy.Host.V2B` |
| **Display Name** | SCADA Bridge LMX Proxy V2 | SCADA Bridge LMX Proxy V2B |
| **MxAccess Client Name** | `LmxProxy-A` | `LmxProxy-B` |
| **Publish Directory** | `C:\publish-v2\` | `C:\publish-v2b\` |
| **gRPC Port** | 50100 | 50101 |
| **HTTP Status Port** | 8081 | 8082 |
| **Log File Prefix** | `lmxproxy-v2-` | `lmxproxy-v2b-` |
| **Log Directory** | `C:\publish-v2\logs\` | `C:\publish-v2b\logs\` |
| **Health Probe Tag** | `DevAppEngine.Scheduler.ScanTime` | `DevAppEngine.Scheduler.ScanTime` |
| **Health Probe Tag** | `DevPlatform.Scheduler.ScanTime` | `DevPlatform.Scheduler.ScanTime` |
| **API Keys File** | `C:\publish-v2\apikeys.json` | `C:\publish-v2b\apikeys.json` |
| **Auto-Start** | Yes | Yes |

3
lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/Configuration/LmxProxyConfiguration.cs
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@@ -9,6 +9,9 @@ namespace ZB.MOM.WW.LmxProxy.Host.Configuration
/// <summary>Path to API key configuration file. Default: apikeys.json.</summary>
public string ApiKeyConfigFile { get; set; } = "apikeys.json";
/// <summary>Unique client name for MxAccess Register(). Must be unique per instance. Default: auto-generated.</summary>
public string? ClientName { get; set; }
/// <summary>MxAccess connection settings.</summary>
public ConnectionConfiguration Connection { get; set; } = new ConnectionConfiguration();

3
lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/LmxProxyService.cs
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@@ -70,7 +70,8 @@ namespace ZB.MOM.WW.LmxProxy.Host
probeTestTagAddress: _config.HealthCheck.TestTagAddress,
probeTimeoutMs: _config.HealthCheck.ProbeTimeoutMs,
maxConsecutiveTransportFailures: _config.HealthCheck.MaxConsecutiveTransportFailures,
degradedProbeIntervalMs: _config.HealthCheck.DegradedProbeIntervalMs);
degradedProbeIntervalMs: _config.HealthCheck.DegradedProbeIntervalMs,
clientName: _config.ClientName);
// 5. Connect to MxAccess synchronously (with timeout)
Log.Information("Connecting to MxAccess (timeout: {Timeout}s)...",

5
lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/MxAccess/MxAccessClient.Connection.cs
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@@ -107,8 +107,9 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
_lmxProxy.OnDataChange += OnDataChange;
_lmxProxy.OnWriteComplete += OnWriteComplete;
// Register with MxAccess
_connectionHandle = _lmxProxy.Register("ZB.MOM.WW.LmxProxy.Host");
// Register with MxAccess using unique client name
_connectionHandle = _lmxProxy.Register(_clientName);
Log.Information("Registered with MxAccess as '{ClientName}'", _clientName);
if (_connectionHandle <= 0)
{

5
lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/MxAccess/MxAccessClient.cs
View File

@@ -26,6 +26,7 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
private readonly bool _autoReconnect;
private readonly string? _nodeName;
private readonly string? _galaxyName;
private readonly string _clientName;
private readonly SemaphoreSlim _readSemaphore;
private readonly SemaphoreSlim _writeSemaphore;
@@ -81,7 +82,8 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
string? probeTestTagAddress = null,
int probeTimeoutMs = 5000,
int maxConsecutiveTransportFailures = 3,
int degradedProbeIntervalMs = 30000)
int degradedProbeIntervalMs = 30000,
string? clientName = null)
{
_maxConcurrentOperations = maxConcurrentOperations;
_readTimeoutMs = readTimeoutSeconds * 1000;
@@ -94,6 +96,7 @@ namespace ZB.MOM.WW.LmxProxy.Host.MxAccess
_probeTimeoutMs = probeTimeoutMs;
_maxConsecutiveTransportFailures = maxConsecutiveTransportFailures;
_degradedProbeIntervalMs = degradedProbeIntervalMs;
_clientName = clientName ?? "LmxProxy-" + Guid.NewGuid().ToString("N").Substring(0, 8);
_readSemaphore = new SemaphoreSlim(maxConcurrentOperations, maxConcurrentOperations);
_writeSemaphore = new SemaphoreSlim(maxConcurrentOperations, maxConcurrentOperations);