/// <exception cref="System.IO.IOException"/>
private bool ReadContainerLogs(HtmlBlock.Block html, AggregatedLogFormat.ContainerLogsReader
logReader, AggregatedLogsBlock.LogLimits logLimits, string desiredLogType, long
logUpLoadTime)
{
int bufferSize = 65536;
char[] cbuf = new char[bufferSize];
bool foundLog = false;
string logType = logReader.NextLog();
while (logType != null)
{
if (desiredLogType == null || desiredLogType.IsEmpty() || desiredLogType.Equals(logType
))
{
long logLength = logReader.GetCurrentLogLength();
if (foundLog)
{
html.Pre().("\n\n").();
}
html.P().("Log Type: " + logType).();
html.P().("Log Upload Time: " + Times.Format(logUpLoadTime)).();
html.P().("Log Length: " + System.Convert.ToString(logLength)).();
long start = logLimits.start < 0 ? logLength + logLimits.start : logLimits.start;
start = start < 0 ? 0 : start;
start = start > logLength ? logLength : start;
long end = logLimits.end < 0 ? logLength + logLimits.end : logLimits.end;
end = end < 0 ? 0 : end;
end = end > logLength ? logLength : end;
end = end < start ? start : end;
long toRead = end - start;
if (toRead < logLength)
{
html.P().("Showing " + toRead + " bytes of " + logLength + " total. Click ").A(Url
("logs", $(YarnWebParams.NmNodename), $(YarnWebParams.ContainerId), $(YarnWebParams
.EntityString), $(YarnWebParams.AppOwner), logType, "?start=0"), "here").(" for the full log."
).();
}
long totalSkipped = 0;
while (totalSkipped < start)
{
long ret = logReader.Skip(start - totalSkipped);
if (ret == 0)
{
//Read one byte
int nextByte = logReader.Read();
// Check if we have reached EOF
if (nextByte == -1)
{
throw new IOException("Premature EOF from container log");
}
ret = 1;
}
totalSkipped += ret;
}
int len = 0;
int currentToRead = toRead > bufferSize ? bufferSize : (int)toRead;
Hamlet.PRE <Org.Apache.Hadoop.Yarn.Webapp.Hamlet.Hamlet> pre = html.Pre();
while (toRead > 0 && (len = logReader.Read(cbuf, 0, currentToRead)) > 0)
{
pre.(new string(cbuf, 0, len));
toRead = toRead - len;
currentToRead = toRead > bufferSize ? bufferSize : (int)toRead;
}
pre.();
foundLog = true;
}
logType = logReader.NextLog();
}
return(foundLog);
}