@Override
protected void pageBody(HttpServletRequest req, HttpServletResponse response, StringBuilder sb)
throws Exception {
String tserverAddress = req.getParameter("s");
// Check to make sure tserver is a known address
boolean tserverExists = false;
if (tserverAddress != null && tserverAddress.isEmpty() == false) {
for (TabletServerStatus ts : Monitor.getMmi().getTServerInfo()) {
if (tserverAddress.equals(ts.getName())) {
tserverExists = true;
break;
}
}
}
if (tserverAddress == null || tserverAddress.isEmpty() || tserverExists == false) {
doBadTserverList(req, sb);
doDeadTserverList(req, sb);
ArrayList<TabletServerStatus> tservers = new ArrayList<TabletServerStatus>();
if (Monitor.getMmi() != null) tservers.addAll(Monitor.getMmi().tServerInfo);
Table tServerList = new Table("tservers", "Tablet Servers");
tServerList.setSubCaption(
"Click on the <span style='color: #0000ff;'>server address</span> to view detailed performance statistics for that server.");
doTserverList(req, sb, tservers, null, tServerList);
return;
}
double totalElapsedForAll = 0;
double splitStdDev = 0;
double minorStdDev = 0;
double minorQueueStdDev = 0;
double majorStdDev = 0;
double majorQueueStdDev = 0;
double currentMinorAvg = 0;
double currentMajorAvg = 0;
double currentMinorStdDev = 0;
double currentMajorStdDev = 0;
TabletStats total =
new TabletStats(null, new ActionStats(), new ActionStats(), new ActionStats(), 0, 0, 0, 0);
InetSocketAddress address = AddressUtil.parseAddress(tserverAddress, -1);
TabletStats historical =
new TabletStats(null, new ActionStats(), new ActionStats(), new ActionStats(), 0, 0, 0, 0);
List<TabletStats> tsStats = new ArrayList<TabletStats>();
try {
TabletClientService.Client client =
ThriftUtil.getClient(
new TabletClientService.Client.Factory(), address, Monitor.getSystemConfiguration());
try {
for (String tableId : Monitor.getMmi().tableMap.keySet()) {
tsStats.addAll(
client.getTabletStats(
Tracer.traceInfo(),
SystemCredentials.get().toThrift(Monitor.getInstance()),
tableId));
}
historical =
client.getHistoricalStats(
Tracer.traceInfo(), SystemCredentials.get().toThrift(Monitor.getInstance()));
} finally {
ThriftUtil.returnClient(client);
}
} catch (Exception e) {
banner(sb, "error", "No Such Tablet ServerAvailable");
log.error(e, e);
return;
}
Table perTabletResults = new Table("perTabletResults", "Detailed Current Operations");
perTabletResults.setSubCaption("Per-tablet Details");
perTabletResults.addSortableColumn("Table", new TableLinkType(), null);
perTabletResults.addSortableColumn("Tablet");
perTabletResults.addSortableColumn("Entries", new NumberType<Long>(), null);
perTabletResults.addSortableColumn("Ingest", new NumberType<Long>(), null);
perTabletResults.addSortableColumn("Query", new NumberType<Long>(), null);
perTabletResults.addSortableColumn("Minor Avg", new SecondType(), null);
perTabletResults.addSortableColumn("Minor Std Dev", new SecondType(), null);
perTabletResults.addSortableColumn("Minor Avg e/s", new NumberType<Double>(), null);
perTabletResults.addSortableColumn("Major Avg", new SecondType(), null);
perTabletResults.addSortableColumn("Major Std Dev", new SecondType(), null);
perTabletResults.addSortableColumn("Major Avg e/s", new NumberType<Double>(), null);
for (TabletStats info : tsStats) {
if (info.extent == null) {
historical = info;
continue;
}
total.numEntries += info.numEntries;
TabletStatsKeeper.update(total.minors, info.minors);
TabletStatsKeeper.update(total.majors, info.majors);
KeyExtent extent = new KeyExtent(info.extent);
String tableId = extent.getTableId().toString();
MessageDigest digester = MessageDigest.getInstance("MD5");
if (extent.getEndRow() != null && extent.getEndRow().getLength() > 0) {
digester.update(extent.getEndRow().getBytes(), 0, extent.getEndRow().getLength());
}
String obscuredExtent = new String(Base64.encodeBase64(digester.digest()));
String displayExtent = String.format("<code>[%s]</code>", obscuredExtent);
TableRow row = perTabletResults.prepareRow();
row.add(tableId);
row.add(displayExtent);
row.add(info.numEntries);
row.add(info.ingestRate);
row.add(info.queryRate);
row.add(info.minors.num != 0 ? info.minors.elapsed / info.minors.num : null);
row.add(stddev(info.minors.elapsed, info.minors.num, info.minors.sumDev));
row.add(info.minors.elapsed != 0 ? info.minors.count / info.minors.elapsed : null);
row.add(info.majors.num != 0 ? info.majors.elapsed / info.majors.num : null);
row.add(stddev(info.majors.elapsed, info.majors.num, info.majors.sumDev));
row.add(info.majors.elapsed != 0 ? info.majors.count / info.majors.elapsed : null);
perTabletResults.addRow(row);
}
// Calculate current averages oldServer adding in historical data
if (total.minors.num != 0) currentMinorAvg = (long) (total.minors.elapsed / total.minors.num);
if (total.minors.elapsed != 0 && total.minors.num != 0)
currentMinorStdDev = stddev(total.minors.elapsed, total.minors.num, total.minors.sumDev);
if (total.majors.num != 0) currentMajorAvg = total.majors.elapsed / total.majors.num;
if (total.majors.elapsed != 0
&& total.majors.num != 0
&& total.majors.elapsed > total.majors.num)
currentMajorStdDev = stddev(total.majors.elapsed, total.majors.num, total.majors.sumDev);
// After these += operations, these variables are now total for current
// tablets and historical tablets
TabletStatsKeeper.update(total.minors, historical.minors);
TabletStatsKeeper.update(total.majors, historical.majors);
totalElapsedForAll += total.majors.elapsed + historical.splits.elapsed + total.minors.elapsed;
minorStdDev = stddev(total.minors.elapsed, total.minors.num, total.minors.sumDev);
minorQueueStdDev = stddev(total.minors.queueTime, total.minors.num, total.minors.queueSumDev);
majorStdDev = stddev(total.majors.elapsed, total.majors.num, total.majors.sumDev);
majorQueueStdDev = stddev(total.majors.queueTime, total.majors.num, total.majors.queueSumDev);
splitStdDev =
stddev(historical.splits.num, historical.splits.elapsed, historical.splits.sumDev);
doDetailTable(req, sb, address, tsStats.size(), total, historical);
doAllTimeTable(
req,
sb,
total,
historical,
majorQueueStdDev,
minorQueueStdDev,
totalElapsedForAll,
splitStdDev,
majorStdDev,
minorStdDev);
doCurrentTabletOps(
req, sb, currentMinorAvg, currentMinorStdDev, currentMajorAvg, currentMajorStdDev);
perTabletResults.generate(req, sb);
}
static void doTserverList(
HttpServletRequest req,
StringBuilder sb,
List<TabletServerStatus> tservers,
String tableId,
Table tServerList) {
int guessHighLoad = ManagementFactory.getOperatingSystemMXBean().getAvailableProcessors();
long now = System.currentTimeMillis();
double avgLastContact = 0.;
for (TabletServerStatus status : tservers) {
avgLastContact += (now - status.lastContact);
}
final long MINUTES = 3 * 60 * 1000;
tServerList.addSortableColumn("Server", new TServerLinkType(), null);
tServerList.addSortableColumn(
"Hosted Tablets", new NumberType<Integer>(0, Integer.MAX_VALUE), null);
tServerList.addSortableColumn(
"Last Contact",
new DurationType(0l, (long) Math.min(avgLastContact * 4, MINUTES)),
null);
tServerList.addSortableColumn(
"Entries", new NumberType<Long>(), "The number of key/value pairs.");
tServerList.addSortableColumn(
"Ingest",
new NumberType<Long>(),
"The number of key/value pairs inserted. (Note that deletes are also 'inserted')");
tServerList.addSortableColumn(
"Query",
new NumberType<Long>(),
"The number of key/value pairs returned to clients. (Not the number of scans)");
tServerList.addSortableColumn(
"Hold Time",
new DurationType(),
"The amount of time ingest is suspended waiting for data to be written to disk.");
tServerList.addSortableColumn(
"Running<br />Scans",
new CompactionsType("scans"),
"The number of scans running and queued on this tablet server.");
tServerList.addSortableColumn(
"Minor<br />Compactions",
new CompactionsType("minor"),
"The number of minor compactions running and (queued waiting for resources). Minor compactions are the operations where entries are flushed from memory to disk.");
tServerList.addSortableColumn(
"Major<br />Compactions",
new CompactionsType("major"),
"The number of major compactions running and (queued waiting for resources). "
+ "Major compactions are the operations where many smaller files are grouped into a larger file, eliminating duplicates and cleaning up deletes.");
tServerList.addSortableColumn(
"Index Cache<br />Hit Rate", new PercentageType(), "The recent index cache hit rate.");
tServerList.addSortableColumn(
"Data Cache<br />Hit Rate", new PercentageType(), "The recent data cache hit rate.");
tServerList.addSortableColumn(
"OS Load",
new NumberType<Double>(0., guessHighLoad * 1., 0., guessHighLoad * 3.),
"The Unix one minute load average. The average number of processes in the run queue over a one minute interval.");
log.debug("tableId: " + tableId);
for (TabletServerStatus status : tservers) {
if (status == null) status = NO_STATUS;
TableInfo summary = Monitor.summarizeTableStats(status);
if (tableId != null) summary = status.tableMap.get(tableId);
if (summary == null) continue;
TableRow row = tServerList.prepareRow();
row.add(status); // add for server name
row.add(summary.tablets);
row.add(now - status.lastContact);
row.add(summary.recs);
row.add(summary.ingestRate);
row.add(summary.queryRate);
row.add(status.holdTime);
row.add(summary); // add for scans
row.add(summary); // add for minor compactions
row.add(summary); // add for major compactions
double indexCacheHitRate =
status.indexCacheHits / (double) Math.max(status.indexCacheRequest, 1);
row.add(indexCacheHitRate);
double dataCacheHitRate =
status.dataCacheHits / (double) Math.max(status.dataCacheRequest, 1);
row.add(dataCacheHitRate);
row.add(status.osLoad);
tServerList.addRow(row);
}
tServerList.generate(req, sb);
}