private void manageMemory() {
while (true) {
MemoryManagementActions mma = null;
Map<KeyExtent, TabletStateImpl> tabletReportsCopy = null;
try {
synchronized (tabletReports) {
tabletReportsCopy = new HashMap<KeyExtent, TabletStateImpl>(tabletReports);
}
ArrayList<TabletState> tabletStates =
new ArrayList<TabletState>(tabletReportsCopy.values());
mma = memoryManager.getMemoryManagementActions(tabletStates);
} catch (Throwable t) {
log.error("Memory manager failed {}", t.getMessage(), t);
}
try {
if (mma != null
&& mma.tabletsToMinorCompact != null
&& mma.tabletsToMinorCompact.size() > 0) {
for (KeyExtent keyExtent : mma.tabletsToMinorCompact) {
TabletStateImpl tabletReport = tabletReportsCopy.get(keyExtent);
if (tabletReport == null) {
log.warn(
"Memory manager asked to compact nonexistent tablet "
+ keyExtent
+ "; manager implementation might be misbehaving");
continue;
}
Tablet tablet = tabletReport.getTablet();
if (!tablet.initiateMinorCompaction(MinorCompactionReason.SYSTEM)) {
if (tablet.isClosed()) {
// attempt to remove it from the current reports if still there
synchronized (tabletReports) {
TabletStateImpl latestReport = tabletReports.remove(keyExtent);
if (latestReport != null) {
if (latestReport.getTablet() != tablet) {
// different tablet instance => put it back
tabletReports.put(keyExtent, latestReport);
} else {
log.debug("Cleaned up report for closed tablet " + keyExtent);
}
}
}
log.debug(
"Ignoring memory manager recommendation: not minor compacting closed tablet "
+ keyExtent);
} else {
log.info(
"Ignoring memory manager recommendation: not minor compacting " + keyExtent);
}
}
}
// log.debug("mma.tabletsToMinorCompact = "+mma.tabletsToMinorCompact);
}
} catch (Throwable t) {
log.error("Minor compactions for memory managment failed", t);
}
sleepUninterruptibly(250, TimeUnit.MILLISECONDS);
}
}
