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  • Administrator's Guide
  • NCache Architecture
    • Cache Topologies
      • Partitioned Topologies
      • Replicated Topology
      • Mirrored Topology
      • Scalability in Topologies
    • Dynamic Clustering
    • Local Cache
    • Cache Client
    • Client Cache
    • Bridge for WAN Replication
    • Connectivity with Load Balancer
    • Serialization Format
    • Data Encryption
    • Data Compression
    • Data Load Balancing
    • Pipelining
    • Cache Server Backward Compatibility
    • Client Backward Compatibility
    • Eviction
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    • Split-Brain
    • Maintenance Mode
    • Runtime Data Sharing
    • Portable Data Types
    • Class Versioning
    • IP Binding with Multiple NICs
    • Graceful Node Down
    • Separate Cache Host Process
    • Self Healing Dynamic Clustering
    • Distributed Cache with Persistence
  • NCache Management Center
  • Configure Caches
    • Create a Cache
      • Local Cache Overview
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        • Pub/Sub Messaging Cache
        • Add Existing Cache
      • Clustered Cache Overview
        • Distributed Cache
        • Persistent Distributed Cache
        • Pub/Sub Messaging Cache
        • Add Existing Clustered Cache
        • Troubleshooting
    • Remove Cache
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    • Add Server Node
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    • Add Test Data
    • Configure Query Indexes
    • Configure JSON Query Indexes
    • Compact Serialization
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    • Add Data Source Providers
      • Read-Through Provider
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      • Configure LinqPad for NCache
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    • Add Client Node
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    • Create Client Cache
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  • Management Operations
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    • Email Notifications
    • Bind IP with Multiple NICs
      • Bind Cluster with a Dedicated IP
      • Bind Client/Server with a Dedicated IP
    • Heartbeat
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    • Communication Reliability
    • Auto Start Cache on Boot
    • Nagle's Algorithm
    • Dual Socket
    • Configuration Files
      • Client Side Configurations
        • Client Config
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      • Server Side Configurations
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        • TLS Config
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        • Emails Template
  • Cache Server Settings
    • Server Connectivity
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    • SQL Server
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    • Miscellaneous Configurations
  • Bridge Server Settings
  • Cache Client Settings
  • Client Cache Settings
  • Configure Security
    • Configure Authentication and Authorization
    • Configure Encryption for Cache
    • Configure TLS Encryption
    • Configure HTTPS for NCache Management Center
  • Configure Bridge for WAN Replication
    • Create Bridge
    • Add Clustered Caches to Bridge
    • Configure Bridge Settings
    • Change Cache Synchronization Modes
    • Bridge Management
    • Synchronize Caches in Bridge
    • Leave Bridge
    • Remove Cache from Bridge
    • Configure Conflict Resolver
  • Setup Database for Cache Synchronization
    • Setup SQL Server Environment
    • Setup Oracle Database Environment
    • Setup OleDb Environment
    • Setup SQL Server for CLR Procedures
  • Simulate NCache Usage
  • Monitor Caches
    • Counters
      • Distributed Cache Counters
      • Distributed Cache with Persistence Counters
      • Pub/Sub Messaging Cache Counters
      • Distributed Lucene Cache Counters
      • Cache Client Counters
      • Bridge Counters
    • Monitor NCache using the NCache Management Center
      • Using Tabular Statistics
        • Configure Counters to Display Caching Statistics
        • Configure Counters to Display Pub/Sub Statistics
        • Configure Counters to Display Lucene Statistics
        • Configure Counters to Display Bridge Statistics
        • Browse Cache Statistics
        • Monitor Bridge
      • Using Monitoring Dashboards
        • Configure Monitor Settings
        • Configure Event Logging
        • Configure API Logging
        • Monitor with a Built-In NCache Monitor Dashboard
        • Monitor with the NCache Monitor Custom Dashboard
        • Monitor Cluster Connectivity
        • Monitor Cache Clusters using NCache Email Alerts
    • Monitor Cache Using Command Line Tools
      • Monitor Cache Server Statistics with Command Line Tools
      • Monitor Cache Client Statistics with Command Line Tools
    • Monitor NCache Using Windows PerfMon Tool
      • Monitoring Cache Server Counters using PerfMon
      • Monitoring Cache Client Counters using PerfMon
      • Monitor Bridge Counters Using PerfMon Tool
    • Monitor NCache using Prometheus
    • Monitor NCache using Grafana
    • Monitor NCache Using SNMP Counters
    • Monitor NCache Using JMX Counters
    • Logging
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      • Performance Counters Logging
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      • Cache Health Alerts
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      • Feature Usage Logging
    • Troubleshooting NCache Monitoring
      • Computer Name Not Found
      • Diskperf Not Installed
      • No READ Access to Perflib Subkeys
      • Unable to Connect to Remote Server
    • IPV6 Support

Troubleshooting Create Cache

Sometimes a cluster can not be formed, or cluster nodes are unable to communicate with each other. It may happen when Server and Cluster ports are blocked by a firewall. The following error messages can occur in this case:

Server Communication Error

Error: "No server is available to process the request"
Error: "Unable to communicate with server node"
Note

However, check your firewall settings using the details in our getting started guide.

Workaround

  • "No server is available to process the request":
    Make sure that the Server port (at which the NCache Service starts and accepts different client connections) is not blocked by a firewall. The default value of this port is '9800'. You can change the default value from the cache server configuration file found in NCache as follows:

    • .NET: Alachisoft.NCache.Service.exe.config located in %NCHOME%/bin/service
    • .NET Core Windows: Alachisoft.NCache.Service.dll.config located in %NCHOME%\bin\service
    • .NET Core Linux: Alachisoft.NCache.Daemon.dll.config located in /opt/ncache/bin/service
    • Java Windows: Alachisoft.NCache.Service.dll.config located in %NCHOME%\bin\service
    • Java Linux: Alachisoft.NCache.Daemon.dll.config located in /opt/ncache/bin/service
  • "Unable to communicate with server node":
    Check to see that the Cluster port is permitted by your firewall. A cluster port is a port at which nodes in a cluster communicate. You can change the default value of these ports from the NCache Management Center. If you have specified a port range in the NCache Management Center, unblock all ports in the range.

  • The NCache Management Center is unable to connect with the NCache Service:
    If the NCache Management Center is unable to connect with NCache Service, even when it is started, then your system firewall might be blocking the Service port (port number 8250). Unblock the Service port from the system firewall.

See Also

Start Cache
Add Server Node
Add Existing Cache
Remove Cache
Clear Cache

In This Article
  • Server Communication Error
    • Workaround
  • See Also

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