Examples of org.apache.hadoop.hbase.errorhandling.ForeignException

Package org.apache.hadoop.hbase.errorhandling

Examples of org.apache.hadoop.hbase.errorhandling.ForeignException

org.apache.hadoop.hbase.errorhandling.ForeignException
A ForeignException is an exception from another thread or process.
ForeignExceptions are sent to 'remote' peers to signal an abort in the face of failures. When serialized for transmission we encode using Protobufs to ensure version compatibility.
Foreign exceptions contain a Throwable as its cause. This can be a "regular" exception generated locally or a ProxyThrowable that is a representation of the original exception created on original 'remote' source. These ProxyThrowables have their their stacks traces and messages overridden to reflect the original 'remote' exception. The only way these ProxyThrowables are generated are by this class's {@link #deserialize(byte[])} method.

      LOG.debug("Found data for znode:" + path);
      subproc = member.createSubprocedure(opName, data);
      member.submitSubprocedure(subproc);
    } catch (IllegalArgumentException iae ) {
      LOG.error("Illegal argument exception", iae);
      sendMemberAborted(subproc, new ForeignException(getMemberName(), iae));
    } catch (IllegalStateException ise) {
      LOG.error("Illegal state exception ", ise);
      sendMemberAborted(subproc, new ForeignException(getMemberName(), ise));
    } catch (KeeperException e) {
      member.controllerConnectionFailure("Failed to get data for new procedure:" + opName,
        new IOException(e));
    }
  }

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    String opName = ZKUtil.getNodeName(abortZNode);
    try {
      byte[] data = ZKUtil.getData(zkController.getWatcher(), abortZNode);


      // figure out the data we need to pass
      ForeignException ee;
      try {
        if (!ProtobufUtil.isPBMagicPrefix(data)) {
          String msg = "Illegally formatted data in abort node for proc " + opName
              + ".  Killing the procedure.";
          LOG.error(msg);
          // we got a remote exception, but we can't describe it so just return exn from here
          ee = new ForeignException(getMemberName(), new IllegalArgumentException(msg));
        } else {
          data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
          ee = ForeignException.deserialize(data);
        }
      } catch (InvalidProtocolBufferException e) {
        LOG.warn("Got an error notification for op:" + opName
            + " but we can't read the information. Killing the procedure.");
        // we got a remote exception, but we can't describe it so just return exn from here
        ee = new ForeignException(getMemberName(), e);
      }


      this.member.receiveAbortProcedure(opName, ee);
    } catch (KeeperException e) {
      member.controllerConnectionFailure("Failed to get data for abort znode:" + abortZNode

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      completeSnapshot(this.snapshotDir, this.workingDir, this.fs);
    } catch (Exception e) {
      String reason = "Failed taking snapshot " + ClientSnapshotDescriptionUtils.toString(snapshot)
          + " due to exception:" + e.getMessage();
      LOG.error(reason, e);
      ForeignException ee = new ForeignException(reason, e);
      monitor.receive(ee);
      // need to mark this completed to close off and allow cleanup to happen.
      cancel("Failed to take snapshot '" + ClientSnapshotDescriptionUtils.toString(snapshot)
          + "' due to exception");
    } finally {

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    this.finished = true;
    LOG.info("Stop taking snapshot=" + ClientSnapshotDescriptionUtils.toString(snapshot) + " because: "
        + why);
    CancellationException ce = new CancellationException(why);
    monitor.receive(new ForeignException(master.getServerName().toString(), ce));
  }

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      String msg = "clone snapshot=" + ClientSnapshotDescriptionUtils.toString(snapshot) + " failed";
      LOG.error(msg, e);
      IOException rse = new RestoreSnapshotException(msg, e, snapshot);


      // these handlers aren't futures so we need to register the error here.
      this.monitor.receive(new ForeignException(NAME, rse));
      throw rse;
    }
  }

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  @Override
  public void cancel(String why) {
    if (this.stopped) return;
    this.stopped = true;
    LOG.info("Stopping clone snapshot=" + snapshot + " because: " + why);
    this.monitor.receive(new ForeignException(NAME, new CancellationException(why)));
  }

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      return false;
    }


    LOG.debug("Verify snapshot=" + snapshot.getName() + " against="
        + sentinel.getSnapshot().getName() + " table=" + snapshot.getTable());
    ForeignException e = sentinel.getExceptionIfFailed();
    if (e != null) throw e;


    // check to see if we are done
    if (sentinel.isFinished()) {
      LOG.debug("Restore snapshot=" + ClientSnapshotDescriptionUtils.toString(snapshot) +

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        Bytes.toString(tableName) + " completed!");
    } catch (IOException e) {
      String msg = "restore snapshot=" + ClientSnapshotDescriptionUtils.toString(snapshot)
          + " failed. Try re-running the restore command.";
      LOG.error(msg, e);
      monitor.receive(new ForeignException(masterServices.getServerName().toString(), e));
      throw new RestoreSnapshotException(msg, e);
    } finally {
      this.stopped = true;
    }
  }

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    this.stopped = true;
    String msg = "Stopping restore snapshot=" + ClientSnapshotDescriptionUtils.toString(snapshot)
        + " because: " + why;
    LOG.info(msg);
    CancellationException ce = new CancellationException(why);
    this.monitor.receive(new ForeignException(masterServices.getServerName().toString(), ce));
  }

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      // wait for the snapshot to complete.  A timer thread is kicked off that should cancel this
      // if it takes too long.
      proc.waitForCompleted();
      LOG.info("Done waiting - snapshot for " + this.snapshot.getName() + " finished!");
    } catch (InterruptedException e) {
      ForeignException ee =
          new ForeignException("Interrupted while waiting for snapshot to finish", e);
      monitor.receive(ee);
      Thread.currentThread().interrupt();
    } catch (ForeignException e) {
      monitor.receive(e);
    }

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org.apache.hadoop.hbase.master.snapshot.RestoreSnapshotHandler

org.apache.hadoop.hbase.master.snapshot.SnapshotManager

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