Examples with ScanSession org.apache.accumulo.tserver.session.ScanSession used on opensource projects

Example 1 with ScanSession

use of org.apache.accumulo.tserver.session.ScanSession in project accumulo by apache.

the class NextBatchTask method run.

@Override
public void run() {
    final ScanSession scanSession = (ScanSession) server.getSession(scanID);
    String oldThreadName = Thread.currentThread().getName();
    try {
        if (isCancelled() || scanSession == null)
            return;
        runState.set(ScanRunState.RUNNING);
        Thread.currentThread().setName("User: " + scanSession.getUser() + " Start: " + scanSession.startTime + " Client: " + scanSession.client + " Tablet: " + scanSession.extent);
        Tablet tablet = server.getOnlineTablet(scanSession.extent);
        if (tablet == null) {
            addResult(new org.apache.accumulo.core.tabletserver.thrift.NotServingTabletException(scanSession.extent.toThrift()));
            return;
        }
        long t1 = System.currentTimeMillis();
        ScanBatch batch = scanSession.scanner.read();
        long t2 = System.currentTimeMillis();
        scanSession.nbTimes.addStat(t2 - t1);
        // there should only be one thing on the queue at a time, so
        // it should be ok to call add()
        // instead of put()... if add() fails because queue is at
        // capacity it means there is code
        // problem somewhere
        addResult(batch);
    } catch (TabletClosedException e) {
        addResult(new org.apache.accumulo.core.tabletserver.thrift.NotServingTabletException(scanSession.extent.toThrift()));
    } catch (IterationInterruptedException iie) {
        if (!isCancelled()) {
            log.warn("Iteration interrupted, when scan not cancelled", iie);
            addResult(iie);
        }
    } catch (TooManyFilesException | SampleNotPresentException e) {
        addResult(e);
    } catch (OutOfMemoryError ome) {
        Halt.halt("Ran out of memory scanning " + scanSession.extent + " for " + scanSession.client, 1);
        addResult(ome);
    } catch (Throwable e) {
        log.warn("exception while scanning tablet " + (scanSession == null ? "(unknown)" : scanSession.extent), e);
        addResult(e);
    } finally {
        runState.set(ScanRunState.FINISHED);
        Thread.currentThread().setName(oldThreadName);
    }
}