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.

    Subprocedure commit = new EmptySubprocedure(member, dispatcher);
    Subprocedure spy = spy(commit);
    when(mockBuilder.buildSubprocedure(op, data)).thenReturn(spy);


    // fail during the prepare phase
    doThrow(new ForeignException("SRC", "prepare exception")).when(spy).acquireBarrier();
    // and throw a connection error when we try to tell the controller about it
    doThrow(new IOException("Controller is down!")).when(mockMemberComms)
        .sendMemberAborted(eq(spy), any(ForeignException.class));

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      if (e instanceof InterruptedException) {
        Thread.currentThread().interrupt();
      }
      String msg = "Procedure '" + procName +"' execution failed!";
      LOG.error(msg, e);
      receive(new ForeignException(getName(), e));
    } finally {
      LOG.debug("Running finish phase.");
      sendGlobalBarrierComplete();
      completedLatch.countDown();

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      // concurrent modification from the controller setting the prepared nodes
      coord.getRpcs().sendGlobalBarrierAcquire(this, args, Lists.newArrayList(this.acquiringMembers));
    } catch (IOException e) {
      coord.rpcConnectionFailure("Can't reach controller.", e);
    } catch (IllegalArgumentException e) {
      throw new ForeignException(getName(), e);
    }
  }

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      return true;
    } catch (RejectedExecutionException e) {
      LOG.warn("Procedure " + procName + " rejected by execution pool.  Propagating error and " +
          "cancelling operation.", e);
      // the thread pool is full and we can't run the procedure
      proc.receive(new ForeignException(procName, e));


      // cancel procedure proactively
      if (f != null) {
        f.cancel(true);
      }

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    for (Procedure proc : toNotify) {
      if (proc == null) {
        continue;
      }
      // notify the elements, if they aren't null
      proc.receive(new ForeignException(proc.getName(), cause));
    }
  }

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      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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  public void cancel(String msg, Throwable cause) {
    LOG.error(msg, cause);
    if (cause instanceof ForeignException) {
      monitor.receive((ForeignException) cause);
    } else {
      monitor.receive(new ForeignException(getMemberName(), cause));
    }
  }

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   * Receive a notification and propagate it to the local coordinator
   * @param abortNode full znode path to the failed procedure information
   */
  protected void abort(String abortNode) {
    String procName = ZKUtil.getNodeName(abortNode);
    ForeignException ee = null;
    try {
      byte[] data = ZKUtil.getData(zkProc.getWatcher(), abortNode);
      if (!ProtobufUtil.isPBMagicPrefix(data)) {
        LOG.warn("Got an error notification for op:" + abortNode
            + " but we can't read the information. Killing the procedure.");
        // we got a remote exception, but we can't describe it
        ee = new ForeignException(coordName, "Data in abort node is illegally formatted.  ignoring content.");
      } else {


        data = Arrays.copyOfRange(data, ProtobufUtil.lengthOfPBMagic(), data.length);
        ee = ForeignException.deserialize(data);
      }
    } catch (InvalidProtocolBufferException e) {
      LOG.warn("Got an error notification for op:" + abortNode
          + " but we can't read the information. Killing the procedure.");
      // we got a remote exception, but we can't describe it
      ee = new ForeignException(coordName, e);
    } catch (KeeperException e) {
      coordinator.rpcConnectionFailure("Failed to get data for abort node:" + abortNode
          + zkProc.getAbortZnode(), new IOException(e));
    }
    coordinator.abortProcedure(procName, ee);

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        " on table=" + 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);
    }
  }

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