public static string Ping()
{
// Add verbose log
EventLogHelper.Write_Verbose("Inside SolrWrapper.Ping() method");
// Need to have a core to monitor/ping
if ((ServiceSettings.Monitor.Cores == null) || (ServiceSettings.Monitor.Cores.Count == 0))
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedPingEventId, "No core found to monitor, so no core to ping.\n\nUpdate the app.config Monitor.Cores value.");
return("Service Configuration Error");
}
// Get the ping information
string ping_url = "http://*****:*****@name='status']").InnerText;
EventLogHelper.Write_Verbose("Parsed the XML and received a status of '" + status + "'");
return(status);
}
catch (Exception ee)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.ExceptionEventId,
"EXCEPTION caught in SolrWrapper.Ping() conversting response to a XML document and reading the status.\n\n--------------------\n\nRESPONSE:\n\n" +
response, ee);
return(null);
}
}
protected override void OnStop()
{
EventLogHelper.Write_Verbose("In SolrService.OnStop() method");
// Stop the ping timer
if (pingTimer != null)
{
pingTimer.Change(Timeout.Infinite, Timeout.Infinite);
}
// Stop solr/lucene
if (!SolrWrapper.Stop())
{
try
{
EventLogHelper.Write_Verbose("Failed to stop solr/lucene on requested service stop - exiting service with exit code of 1064");
ExitCode = 1064;
}
catch (Exception ee)
{
EventLogHelper.Write_Verbose("EXCEPTION caught while trying to exit service with exit code of 1064 due to failed solr/lucene stop on requested service stop");
}
}
}
public static bool Start_Direct(int TimeOut)
{
// Add verbose log
EventLogHelper.Write_Verbose("Inside SolrWrapper.Start_Direct() method");
// Log this start
StringBuilder logStartBuilder = new StringBuilder();
// Check to see if the solr home directory exists
string solr_top = ServiceSettings.Solr.Directory;
if (!Directory.Exists(solr_top))
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStartEventId, "Solr directory " + solr_top + " not found!" + Environment.NewLine + Environment.NewLine + "Install solr/lucene and add the solr server directory under Solr.Directory to the configuration file for this service.");
return(false);
}
// Get and test the solr server directory
string solr_server_dir = Path.Combine(ServiceSettings.Solr.Directory, "server");
if (!String.IsNullOrEmpty(ServiceSettings.Override.SolrServerDir))
{
solr_server_dir = ServiceSettings.Override.SolrServerDir;
}
if (!Directory.Exists(solr_server_dir))
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStartEventId, "Solr server directory " + solr_server_dir + " not found!" + Environment.NewLine + Environment.NewLine + "Re-install solr/lucene and add the solr server directory under Solr.Directory to the configuration file for this service." + Environment.NewLine + Environment.NewLine + "If your setup is non-standard, you can use the Override.SOLR_SERVER_DIR value in the configuration file for this service.");
return(false);
}
// Get and test the solr home directory
string solr_home = Path.Combine(ServiceSettings.Solr.Directory, "server", "solr");
if (!String.IsNullOrEmpty(ServiceSettings.Override.SolrHome))
{
solr_home = ServiceSettings.Override.SolrHome;
}
if (!Directory.Exists(solr_home))
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStartEventId, "Solr home directory " + solr_home + " not found!" + Environment.NewLine + Environment.NewLine + "Re-install solr/lucene and add the solr server directory under Solr.Directory to the configuration file for this service." + Environment.NewLine + Environment.NewLine + "If your setup is non-standard, you can use the Override.SOLR_HOME value in the configuration file for this service.");
return(false);
}
// Backup log files ( use current timestamp for backup names )
string logs_directory = Path.Combine(ServiceSettings.Solr.Directory, "server", "logs");
if (!String.IsNullOrEmpty(ServiceSettings.Override.SolrLogsDir))
{
logs_directory = ServiceSettings.Override.SolrLogsDir;
}
// Only continue if log directory exists
if (Directory.Exists(logs_directory))
{
string now_ts = DateTime.Now.Year + "-" + DateTime.Now.Month.ToString().PadLeft(2, '0') + "-" +
DateTime.Now.Day.ToString().PadLeft(2, '0') + "_" +
DateTime.Now.Hour.ToString().PadLeft(2, '0') +
DateTime.Now.Minute.ToString().PadLeft(2, '0');
// Backing up the solr.log
string solr_log = Path.Combine(logs_directory, "solr.log");
if (File.Exists(solr_log))
{
logStartBuilder.AppendLine("Backing up " + solr_log);
try
{
string new_solr_log = Path.Combine(logs_directory, "solr_log_" + now_ts + ".bak");
if (File.Exists(new_solr_log))
{
char append = 'a';
while ((append != 'z') &&
(File.Exists(Path.Combine(logs_directory, "solr_log_" + now_ts + append + ".bak"))))
{
append = (char)(((int)append) + 1);
}
new_solr_log = Path.Combine(logs_directory, "solr_log_" + now_ts + append + ".bak");
}
File.Move(solr_log, new_solr_log);
}
catch (Exception ee)
{
logStartBuilder.AppendLine("Error backing up log file: " + ee.Message);
}
}
// Backing up the garbage collection log
string solr_gc_log = Path.Combine(logs_directory, "solr_gc.log");
if (File.Exists(solr_gc_log))
{
logStartBuilder.AppendLine("Backing up " + solr_gc_log);
try
{
string new_solr_gc_log = Path.Combine(logs_directory, "solr_gc_log_" + now_ts + ".bak");
if (File.Exists(new_solr_gc_log))
{
char append = 'a';
while ((append != 'z') &&
(File.Exists(Path.Combine(logs_directory, "solr_gc_log_" + now_ts + append + ".bak"))))
{
append = (char)(((int)append) + 1);
}
new_solr_gc_log = Path.Combine(logs_directory, "solr_gc_log_" + now_ts + append + ".bak");
}
File.Move(solr_gc_log, new_solr_gc_log);
}
catch (Exception ee)
{
logStartBuilder.AppendLine("Error backing up garbage collection log file: " + ee.Message);
}
}
}
else
{
// log directory does not exist, try to create it
try
{
Directory.CreateDirectory(logs_directory);
}
catch (Exception ee)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStartEventId, "Logging directory " + ServiceSettings.Solr.Directory + " not found and the request to create the directory failed!", ee);
return(false);
}
}
// Check to see if the port is currently in use?
if (is_port_in_use(ServiceSettings.Solr.Port))
{
EventLogHelper.Write_Event(ServiceSettings.Logging.FailedStartEventId, "Solr port (" + ServiceSettings.Solr.Port + ") is currently in use." + Environment.NewLine + Environment.NewLine + "Will attemp to restart solr by first issuing a stop command.");
// Issue the stop
Stop();
// Now, double check that it is still not in use
if (is_port_in_use(ServiceSettings.Solr.Port))
{
EventLogHelper.Write_Event(ServiceSettings.Logging.FailedStartEventId, "A process is already listening on port " + ServiceSettings.Solr.Port + ". If this is not Solr, then please choose a different port in the service configuration file.");
return(false);
}
}
// Set some initial values
Exception CaughtException = null;
// Determine some of the directory values that are derivaties of the solr home
string log4j_props = Path.Combine(ServiceSettings.Solr.Directory, "server", "resources", "log4j.properties");
if (!String.IsNullOrEmpty(ServiceSettings.Override.Log4jConfig))
{
log4j_props = ServiceSettings.Override.Log4jConfig;
}
string java_tempdir = Path.Combine(solr_server_dir, "tmp");
// string gc_log = Path.Combine(logs_directory, "solr_gc.log");
// string jar_file = Path.Combine(solr_server_dir, "start.jar");
// Build the arguments
StringBuilder argsBuilder = new StringBuilder();
argsBuilder.Append(ServiceSettings.StartArgs.ServerOpts);
argsBuilder.Append(" -Xss256k");
argsBuilder.Append(" " + ServiceSettings.StartArgs.JavaMemory);
argsBuilder.Append(" -Duser.timezone=" + ServiceSettings.StartArgs.TimeZone);
argsBuilder.Append(" " + ServiceSettings.StartArgs.GcTune);
argsBuilder.Append(" " + ServiceSettings.StartArgs.GcLogOpts);
argsBuilder.Append(" -Xloggc:\"" + logs_directory + "\"/solr_gc.log");
argsBuilder.Append(" -Dlog4j.configuration=\"file:" + log4j_props + "\"");
argsBuilder.Append(" -DSTOP.PORT=" + ServiceSettings.Solr.StopPort);
argsBuilder.Append(" -DSTOP.KEY=" + ServiceSettings.Solr.StopKey);
argsBuilder.Append(" -Djetty.port=" + ServiceSettings.Solr.Port);
argsBuilder.Append(" -Dsolr.solr.home=\"" + solr_home + "\"");
argsBuilder.Append(" -Dsolr.install.dir=\"" + solr_top + "\"");
argsBuilder.Append(" -DJetty.home=\"" + solr_server_dir + "\"");
argsBuilder.Append(" -Djava.io.tmpdir=\"" + java_tempdir + "\"");
argsBuilder.Append(" -jar start.jar");
argsBuilder.Append(" \"--module=http\"");
string args = argsBuilder.ToString();
// Using string builders to collect the standard output and error
StringBuilder output = new StringBuilder();
StringBuilder error = new StringBuilder();
// Perform all this work within using tag to encourage disposing of the process and events
bool returnValue = true;
using (AutoResetEvent outputWaitHandle = new AutoResetEvent(false))
using (AutoResetEvent errorWaitHandle = new AutoResetEvent(false))
{
using (Process startSolrProcess = new Process())
{
try
{
startSolrProcess.StartInfo.FileName = JavaWrapper.Java_Executable;
startSolrProcess.StartInfo.Arguments = args;
startSolrProcess.StartInfo.WorkingDirectory = solr_server_dir;
startSolrProcess.StartInfo.UseShellExecute = false;
startSolrProcess.StartInfo.RedirectStandardOutput = true;
startSolrProcess.StartInfo.RedirectStandardError = true;
startSolrProcess.StartInfo.CreateNoWindow = true;
// Add a function to handle asynchronous reading of the standard output
startSolrProcess.OutputDataReceived += (sender, e) =>
{
if (e.Data == null)
{
outputWaitHandle.Set();
}
else
//if (e.Data != null)
{
output.AppendLine(" " + e.Data);
}
};
// Add a function to handle asynchronous reading of the standard error
startSolrProcess.ErrorDataReceived += (sender, e) =>
{
if (e.Data == null)
{
errorWaitHandle.Set();
}
else
//if (e.Data != null)
{
error.AppendLine(" " + e.Data);
}
};
// Log (verbose) actual arguments
EventLogHelper.Write_Verbose("About to run command to start solr/jetty." + Environment.NewLine + Environment.NewLine + "Executable: " + JavaWrapper.Java_Executable + Environment.NewLine + Environment.NewLine + "Arguments: " + args + Environment.NewLine + Environment.NewLine + "Working Directory: " + solr_server_dir);
// Start the process
startSolrProcess.Start();
// Start the asyncronous reading of the standard input and standard output
startSolrProcess.BeginOutputReadLine();
startSolrProcess.BeginErrorReadLine();
// Wait for the process to copmlete
if (startSolrProcess.WaitForExit(TimeOut))
{
// Give the output readers slightly more time to finish any reading
if (outputWaitHandle.WaitOne(100) && errorWaitHandle.WaitOne(100))
{
// Successfully ended and process completed. Check process exit code here.
int exitCode = startSolrProcess.ExitCode;
EventLogHelper.Write_Verbose("Solr/Lucene request closed with exit code of " + exitCode);
}
startSolrProcess.CancelOutputRead();
startSolrProcess.CancelErrorRead();
}
else
{
// Timed out.
EventLogHelper.Write_Verbose("Timeout occurred during solr/lucene startup");
outputWaitHandle.WaitOne(100);
errorWaitHandle.WaitOne(100);
startSolrProcess.CancelOutputRead();
startSolrProcess.CancelErrorRead();
}
startSolrProcess.Close();
// Add the error output if something was received
if (error.ToString().Trim().Length > 0)
{
logStartBuilder.AppendLine("==============================" + Environment.NewLine + "STANDARD OUTPUT: " + Environment.NewLine + output.ToString() + Environment.NewLine + Environment.NewLine + "STANDARD ERROR:" + Environment.NewLine + error.ToString());
}
EventLogHelper.Write_Event(ServiceSettings.Logging.StartEventId, "Solr/Lucene start attempt completed" + Environment.NewLine + logStartBuilder.ToString() + Environment.NewLine);
}
catch (Exception ee)
{
CaughtException = ee;
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStartEventId, String.Format(ERROR_MESSAGE_TEMPLATE, "EXCEPTION detected during solr/lucene startup attempt", solrExecutable + " " + argsBuilder, output.ToString(), error.ToString()), ee);
returnValue = true;
}
}
}
// Log this to the solr log directory
string solr_log_file = Path.Combine(logs_directory, "solr-" + ServiceSettings.Solr.Port + "-service.log");
try
{
StreamWriter writer = new StreamWriter(solr_log_file, false);
writer.WriteLine("LOG FILE CREATED " + DateTime.Now.ToString() + " BY SOLR SERVICE WRAPPER");
writer.WriteLine();
writer.WriteLine("Executable: " + JavaWrapper.Java_Executable);
writer.WriteLine();
writer.WriteLine("Arguments: " + args);
writer.WriteLine();
writer.WriteLine("Working directory: " + solr_server_dir);
writer.WriteLine();
writer.WriteLine("====================================================");
writer.WriteLine();
writer.WriteLine(logStartBuilder.ToString());
writer.WriteLine();
if (error.ToString().Trim().Length > 0)
{
writer.WriteLine("====================================================");
writer.WriteLine();
writer.WriteLine("REDIRECTED ERROR:");
writer.WriteLine(error.ToString());
writer.WriteLine();
}
if (CaughtException != null)
{
writer.WriteLine("====================================================");
writer.WriteLine();
writer.WriteLine("CAUGHT EXCEPTION:");
writer.WriteLine(CaughtException.Message);
writer.WriteLine();
writer.WriteLine(CaughtException.StackTrace);
writer.WriteLine();
}
writer.WriteLine("====================================================");
writer.WriteLine();
writer.WriteLine("REDIRECTED OUTPUT:");
writer.WriteLine(output.ToString());
writer.WriteLine();
writer.Flush();
writer.Close();
}
catch (Exception ee)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.ExceptionEventId, "Unexpected exception trying to write the log file " + solr_log_file, ee);
}
return(returnValue);
}
private static string Get_Solr_Web_Response(string URL, bool LogRequest)
{
// Return string
string responseFromServer = String.Empty;
// Add verbose log
if (LogRequest)
{
EventLogHelper.Write_Verbose("In SolrWrapper.Get_Solr_Response('" + URL + "')");
}
try
{
// Create a request for the URL
WebRequest request = WebRequest.Create(URL);
request.Credentials = CredentialCache.DefaultCredentials;
((HttpWebRequest)request).UserAgent = ServiceSettings.Name;
// Get the response object
using (WebResponse response = request.GetResponse())
{
// Log the status
if (LogRequest)
{
EventLogHelper.Write_Verbose("Status received: " + ((HttpWebResponse)response).StatusDescription);
}
// Get the stream containing content returned by the server.
using (Stream dataStream = response.GetResponseStream())
{
if (dataStream != null)
{
dataStream.ReadTimeout = 30000;
// Open the stream using a StreamReader for easy access.
using (StreamReader reader = new StreamReader(dataStream))
{
// Read the content.
responseFromServer = reader.ReadToEnd();
// Clean up the streams and the response.
reader.Close();
}
dataStream.Close();
}
}
response.Close();
}
}
catch (WebException we)
{
// Try to read the response from the exception
try
{
Stream dataStream = we.Response.GetResponseStream();
StreamReader reader = new StreamReader(dataStream);
string errorResponse = reader.ReadToEnd();
EventLogHelper.Write_Error(ServiceSettings.Logging.ExceptionEventId, "WEB EXCEPTION caught in SolrWrapper.Get_Solr_Response('" + URL + "'). Request returned a status of " + we.Status.ToString() + "\n\n--------------------\n\nRESPONSE:\n\n" + errorResponse, we);
return("404");
}
catch (Exception)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.ExceptionEventId, "WEB EXCEPTION caught in SolrWrapper.Get_Solr_Response('" + URL + "'). Request returned a status of " + we.Status.ToString(), we);
return("500");
}
}
catch (Exception ee)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.ExceptionEventId, "GENERAL EXCEPTION caught in SolrWrapper.Get_Solr_Response('" + URL + "')", ee);
return(null);
}
// Log the response
if (LogRequest)
{
EventLogHelper.Write_Verbose("RESPONSE RECEIVED:\n\n" + responseFromServer);
}
return(responseFromServer);
}
public static bool Stop()
{
// Add verbose log
EventLogHelper.Write_Verbose("Inside SolrWrapper.Stop() method");
// Check to see if the port is open
if (!is_port_in_use(ServiceSettings.Solr.Port))
{
EventLogHelper.Write_Event(ServiceSettings.Logging.FailedStopEventId, "Solr port (" + ServiceSettings.Solr.Port + ") is not currently in use." + Environment.NewLine + Environment.NewLine + "Solr stop command will not be executed.");
return(true);
}
// Get and test the solr server directory
string solr_server_dir = Path.Combine(ServiceSettings.Solr.Directory, "server");
if (!String.IsNullOrEmpty(ServiceSettings.Override.SolrServerDir))
{
solr_server_dir = ServiceSettings.Override.SolrServerDir;
}
if (!Directory.Exists(solr_server_dir))
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStopEventId, "Solr server directory " + solr_server_dir + " not found!" + Environment.NewLine + Environment.NewLine + "Re-install solr/lucene and add the solr server directory under Solr.Directory to the configuration file for this service." + Environment.NewLine + Environment.NewLine + "If your setup is non-standard, you can use the Override.SOLR_SERVER_DIR value in the configuration file for this service.");
return(false);
}
// Build the arguments
StringBuilder argsBuilder = new StringBuilder();
argsBuilder.Append(" -DJetty.home=\"" + solr_server_dir + "\"");
argsBuilder.Append(" -jar start.jar");
argsBuilder.Append(" STOP.PORT=" + ServiceSettings.Solr.StopPort);
argsBuilder.Append(" STOP.KEY=" + ServiceSettings.Solr.StopKey);
argsBuilder.Append(" --stop");
string args = argsBuilder.ToString();
// Using string builders to collect the standard output and error
StringBuilder output = new StringBuilder();
StringBuilder error = new StringBuilder();
// Perform all this work within using tag to encourage disposing of the process and events
bool returnValue = true;
using (AutoResetEvent outputWaitHandle = new AutoResetEvent(false))
using (AutoResetEvent errorWaitHandle = new AutoResetEvent(false))
{
using (Process startSolrProcess = new Process())
{
try
{
startSolrProcess.StartInfo.FileName = JavaWrapper.Java_Executable;
startSolrProcess.StartInfo.Arguments = args;
startSolrProcess.StartInfo.WorkingDirectory = solr_server_dir;
startSolrProcess.StartInfo.UseShellExecute = false;
startSolrProcess.StartInfo.RedirectStandardOutput = true;
startSolrProcess.StartInfo.RedirectStandardError = true;
startSolrProcess.StartInfo.CreateNoWindow = true;
// Add a function to handle asynchronous reading of the standard output
startSolrProcess.OutputDataReceived += (sender, e) =>
{
if (e.Data == null)
{
outputWaitHandle.Set();
}
else
//if (e.Data != null)
{
output.AppendLine(" " + e.Data);
}
};
// Add a function to handle asynchronous reading of the standard error
startSolrProcess.ErrorDataReceived += (sender, e) =>
{
if (e.Data == null)
{
errorWaitHandle.Set();
}
else
//if (e.Data != null)
{
error.AppendLine(" " + e.Data);
}
};
// Log (verbose) actual arguments
EventLogHelper.Write_Verbose("About to run command to start solr/jetty." + Environment.NewLine + Environment.NewLine + "Executable: " + JavaWrapper.Java_Executable + Environment.NewLine + Environment.NewLine + "Arguments: " + args + Environment.NewLine + Environment.NewLine + "Working Directory: " + solr_server_dir);
// Start the process
startSolrProcess.Start();
// Start the asyncronous reading of the standard input and standard output
startSolrProcess.BeginOutputReadLine();
startSolrProcess.BeginErrorReadLine();
// Wait for the process to copmlete
if (startSolrProcess.WaitForExit(5000))
{
// Give the output readers slightly more time to finish any reading
if (outputWaitHandle.WaitOne(100) && errorWaitHandle.WaitOne(100))
{
// Successfully ended and process completed. Check process exit code here.
int exitCode = startSolrProcess.ExitCode;
EventLogHelper.Write_Verbose("Solr/Lucene request closed with exit code of " + exitCode);
}
startSolrProcess.CancelOutputRead();
startSolrProcess.CancelErrorRead();
}
else
{
// Timed out.
EventLogHelper.Write_Verbose("Timeout occurred during solr/lucene stop");
outputWaitHandle.WaitOne(100);
errorWaitHandle.WaitOne(100);
startSolrProcess.CancelOutputRead();
startSolrProcess.CancelErrorRead();
}
startSolrProcess.Close();
// If there was error caught from the misdirection add it here
StringBuilder stopSolrBuilder = new StringBuilder("Solr/Lucene stop attempt completed");
if ((error.ToString().Trim().Length > 0) || (output.ToString().Trim().Length > 0))
{
stopSolrBuilder.AppendLine();
stopSolrBuilder.AppendLine(" ============================== ");
stopSolrBuilder.AppendLine();
if (output.ToString().Trim().Length > 0)
{
stopSolrBuilder.AppendLine("Standard output (redirected):");
stopSolrBuilder.AppendLine(output.ToString().Trim());
stopSolrBuilder.AppendLine();
}
if (error.ToString().Trim().Length > 0)
{
stopSolrBuilder.AppendLine("Standard error (redirected):");
stopSolrBuilder.AppendLine(error.ToString().Trim());
stopSolrBuilder.AppendLine();
}
}
EventLogHelper.Write_Event(ServiceSettings.Logging.StopEventId, stopSolrBuilder.ToString());
}
catch (Exception ee)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedStopEventId, String.Format(ERROR_MESSAGE_TEMPLATE, "EXCEPTION detected during solr/lucene stop attempt", solrExecutable + " " + argsBuilder, output.ToString(), error.ToString()), ee);
return(false);
}
}
}
return(true);
}
protected override void OnStart(string[] args)
{
EventLogHelper.Write_Verbose("In SolrService.OnStart() method");
// Check the JAVA version
if (!JavaWrapper.Check_Java())
{
// Just abort, since the java wrapper logs any errors
return;
}
// Try to start SOLR
if (!SolrWrapper.Start_Direct(20000))
{
try
{
EventLogHelper.Write_Verbose("Failed to start - exiting service with exit code of 1064");
ExitCode = 1064;
Stop();
}
catch (Exception ee)
{
EventLogHelper.Write_Verbose("EXCEPTION caught while trying to exit service with exit code of 1064 due to failed solr/lucene start");
}
return;
}
// Try to ping the solr/lucene instance, just to ensure it is working
try
{
if (SolrWrapper.Ping() == "OK")
{
// Log the successful ping
EventLogHelper.Write_Event(ServiceSettings.Logging.PingEventId, "Successfully pinged solr/lucene for routine monitoring");
}
else
{
// Write the error message
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedPingEventId, "Error while pinging solr/lucene for routine monitoring");
// During startup, terminate on the first failed ping
ExitCode = 1064;
Stop();
}
}
catch (Exception ex)
{
EventLogHelper.Write_Error(ServiceSettings.Logging.FailedPingEventId, "EXCEPTION CAUGHT while pinging solr/lucene for routine monitoring", ex);
// During startup, terminate on the first failed ping
ExitCode = 1064;
Stop();
}
// Since Solr started, start up the timer
if (ServiceSettings.Monitor.PauseDuration > 0)
{
EventLogHelper.Write_Verbose("Starting the ping timer in SolrService.OnStart() with an internval of " + ServiceSettings.Monitor.PauseDuration + " seconds.");
// Tell the timer to fire again in XX milliseconds, and only fire that once
pingTimer = new Timer(pingTimerExpired, null, ServiceSettings.Monitor.PauseDuration * 1000, Timeout.Infinite);
}
}