---
title:  Session State Log Files
---

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Several log files are written by the various parts of the session management code.

-   `catalina.log`. Log file written by the tc server
-   `cacheserver.log`. Log file written by the <%=vars.product_name%> server process.
-   `gemfire_modules.log`. Log file written by the <%=vars.product_name%> cache client.

## <a id="concept_33F73F78783D4994B721486243827E15__section_A547F9C7AA4541ED9B99CF0DEAC1417A" class="no-quick-link"></a>Adding FINE Debug Logging to catalina.log

To add <%=vars.product_name%>-specific FINE logging to the `catalina.log` file, add the following lines to your `<instance>/conf/logging.properties` file:

``` pre
org.apache.geode.modules.session.catalina.DeltaSessionManager.level = FINE
org.apache.geode.modules.session.catalina.DeltaSession.level = FINE
```

These configurations will add FINE logging to the `catalina.DATE.log` file. The following is an example of FINE logging:

``` pre
06-Sep-2011 15:59:47.250 FINE org.apache.geode.modules.session.catalina.DeltaSessionManager.start 
DeltaSessionManager[container=StandardEngine[Catalina].StandardHost[localhost].StandardContext[/manager]; 
regionName=gemfire_modules_sessions; regionAttributesId=PARTITION_REDUNDANT]: Starting

06-Sep-2011 15:59:47.254 FINE org.apache.geode.modules.session.catalina.DeltaSessionManager.registerJvmRouteBinderValve 
DeltaSessionManager[container=StandardEngine[Catalina].StandardHost[localhost].StandardContext[/manager]; 
regionName=gemfire_modules_sessions; regionAttributesId=PARTITION_REDUNDANT]: Registering JVM route binder valve

06-Sep-2011 15:59:47.351 FINE org.apache.geode.modules.session.catalina.ClientServerSessionCache.createOrRetrieveRegion 
Created session region: org.apache.geode.internal.cache.LocalRegion[path='/gemfire_modules_sessions';
scope=LOCAL';dataPolicy=EMPTY; gatewayEnabled=false]
```

## <a id="concept_33F73F78783D4994B721486243827E15__section_CF950FC81CC046838F42A3E6783985BD" class="no-quick-link"></a>Add Session State Logging to the <%=vars.product_name%> Server Log

To add session-state-specific logging to the <%=vars.product_name%> server log file, add the following property to the `catalina.properties` file for the tc Server instance:

``` pre
geode-cs.enable.debug.listener=true
```

Adding this configuration will print logging in the server log such as the following:

``` pre
[info 2011/09/06 15:18:27.749 PDT  <ServerConnection on port 40404 Thread 3> tid=0x32] DebugCacheListener: Received 
CREATE for key=5782ED83A3D9F101BBF8D851CE4E798E; value=DeltaSession[id=5782ED83A3D9F101BBF8D851CE4E798E; 
sessionRegionName=gemfire_modules_sessions; operatingRegionName=unset]

[info 2011/09/06 15:18:27.769 PDT  <ServerConnection on port 40404 Thread 3> tid=0x32] DebugCacheListener: Received UPDATE 
for key=5782ED83A3D9F101BBF8D851CE4E798E; value=DeltaSession[id=5782ED83A3D9F101BBF8D851CE4E798E; 
sessionRegionName=gemfire_modules_sessions; operatingRegionName=unset]

[info 2011/09/06 15:19:36.729 PDT  <Timer-2> tid=0x24] DebugCacheListener: Received EXPIRE_DESTROY for 
key=5782ED83A3D9F101BBF8D851CE4E798E
```

## <a id="concept_33F73F78783D4994B721486243827E15__section_B446063292F0447CA178DB67245B72C1" class="no-quick-link"></a>Adding Additional Debug Logging to the <%=vars.product_name%> Server Log

To add fine-level logging to the <%=vars.product_name%> cache server, add the 'log-level' property to the server process. For example:

``` pre
gfsh> start server --name=server1 --cache-xml-file=../conf/cache-server.xml 
              --log-level=fine
```

This will add fine-level logging to the `server.log` file.

**Note:**
This will help debug <%=vars.product_name%> server issues, but it adds a lot of logging to the file.

## <a id="concept_33F73F78783D4994B721486243827E15__section_D36A81360D904450B8BE7334897C5685" class="no-quick-link"></a>Add Debug Logging to gemfire\_modules.log

To add fine-level logging to the <%=vars.product_name%> Cache Client, add the 'log-level' property to the Listener element in the tc Server or Tomcat `server.xml` file. For example:

``` pre
<Listener log-level="fine" 
cache-xml-file="${geode-cs.cache.configuration.file}" 
className="org.apache.geode.modules.session.catalina.ClientServerCacheLifecycleListener"
criticalHeapPercentage="${geode-cs.critical.heap.percentage}"
evictionHeapPercentage="${geode-cs.eviction.heap.percentage}"
log-file="${geode-cs.log.file}"
statistic-archive-file="${geode-cs.statistic.archive.file}"
statistic-sampling-enabled="${geode-cs.statistic.sampling.enabled}"/>
        
```

This will add fine-level logging to the file defined by the `${geode-cs.log.file}` property. The default log file name is `gemfire_modules.log`.

**Note:**
This will help debug <%=vars.product_name%> client issues, but it adds a lot of logging to the file.