| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.drill.exec.physical.impl; |
| |
| import java.util.List; |
| |
| import org.apache.drill.common.DeferredException; |
| import org.apache.drill.exec.exception.OutOfMemoryException; |
| import org.apache.drill.exec.ops.OpProfileDef; |
| import org.apache.drill.exec.ops.OperatorContext; |
| import org.apache.drill.exec.ops.OperatorStats; |
| import org.apache.drill.exec.ops.OperatorUtilities; |
| import org.apache.drill.exec.ops.RootFragmentContext; |
| import org.apache.drill.exec.physical.base.PhysicalOperator; |
| import org.apache.drill.exec.proto.ExecProtos.FragmentHandle; |
| import org.apache.drill.exec.record.CloseableRecordBatch; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.record.RecordBatch.IterOutcome; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| public abstract class BaseRootExec implements RootExec { |
| private static final Logger logger = LoggerFactory.getLogger(BaseRootExec.class); |
| |
| public static final String ENABLE_BATCH_DUMP_CONFIG = "drill.exec.debug.dump_batches"; |
| protected OperatorStats stats; |
| protected OperatorContext oContext; |
| protected RootFragmentContext fragmentContext; |
| private List<CloseableRecordBatch> operators; |
| |
| public BaseRootExec(final RootFragmentContext fragmentContext, final PhysicalOperator config) throws OutOfMemoryException { |
| this(fragmentContext, null, config); |
| } |
| |
| public BaseRootExec(final RootFragmentContext fragmentContext, final OperatorContext oContext, |
| final PhysicalOperator config) throws OutOfMemoryException { |
| if (oContext == null) { |
| this.oContext = fragmentContext.newOperatorContext(config, stats); |
| } else { |
| this.oContext = oContext; |
| } |
| //Creating new stat for appending to list |
| stats = new OperatorStats(new OpProfileDef(config.getOperatorId(), |
| config.getOperatorType(), OperatorUtilities.getChildCount(config)), |
| this.oContext.getAllocator()); |
| fragmentContext.getStats().addOperatorStats(this.stats); |
| this.fragmentContext = fragmentContext; |
| } |
| |
| void setOperators(List<CloseableRecordBatch> operators) { |
| this.operators = operators; |
| |
| if (logger.isDebugEnabled()) { |
| final StringBuilder sb = new StringBuilder(); |
| sb.append("BaseRootExec("); |
| sb.append(Integer.toString(System.identityHashCode(this))); |
| sb.append(") operators: "); |
| for(final CloseableRecordBatch crb : operators) { |
| sb.append(crb.getClass().getName()); |
| sb.append(' '); |
| sb.append(Integer.toString(System.identityHashCode(crb))); |
| sb.append(", "); |
| } |
| |
| // Cut off the last trailing comma and space |
| sb.setLength(sb.length() - 2); |
| |
| logger.debug(sb.toString()); |
| } |
| } |
| |
| @Override |
| public final boolean next() { |
| assert stats != null; |
| fragmentContext.getExecutorState().checkContinue(); |
| try { |
| stats.startProcessing(); |
| return innerNext(); |
| } finally { |
| stats.stopProcessing(); |
| } |
| } |
| |
| public final IterOutcome next(final RecordBatch b){ |
| stats.stopProcessing(); |
| IterOutcome next; |
| try { |
| next = b.next(); |
| } finally { |
| stats.startProcessing(); |
| } |
| |
| switch(next){ |
| case OK_NEW_SCHEMA: |
| stats.batchReceived(0, b.getRecordCount(), true); |
| break; |
| case OK: |
| stats.batchReceived(0, b.getRecordCount(), false); |
| break; |
| default: |
| } |
| return next; |
| } |
| |
| public abstract boolean innerNext(); |
| |
| @Override |
| public void receivingFragmentFinished(final FragmentHandle handle) { |
| logger.warn("Currently not handling FinishedFragment message"); |
| } |
| |
| @Override |
| public void dumpBatches(Throwable t) { |
| if (operators == null) { |
| return; |
| } |
| if (!fragmentContext.getConfig().getBoolean(ENABLE_BATCH_DUMP_CONFIG)) { |
| return; |
| } |
| |
| CloseableRecordBatch leafMost = findLeaf(operators, t); |
| if (leafMost == null) { |
| // Don't know which batch failed. |
| return; |
| } |
| int batchPosn = operators.indexOf(leafMost); |
| final int numberOfBatchesToDump = Math.min(batchPosn + 1, 2); |
| logger.error("Batch dump started: dumping last {} failed batches", numberOfBatchesToDump); |
| // As batches are stored in a 'flat' List there is a need to filter out the failed batch |
| // and a few of its parent (actual number of batches is set by a constant defined above) |
| for (int i = 0; i < numberOfBatchesToDump; i++) { |
| operators.get(batchPosn--).dump(); |
| } |
| logger.error("Batch dump completed."); |
| } |
| |
| @Override |
| public void close() throws Exception { |
| // We want to account for the time spent waiting here as Wait time in the operator profile |
| try { |
| stats.startProcessing(); |
| stats.startWait(); |
| fragmentContext.waitForSendComplete(); |
| } finally { |
| stats.stopWait(); |
| stats.stopProcessing(); |
| } |
| |
| // close all operators. |
| if (operators != null) { |
| final DeferredException df = new DeferredException(); |
| |
| for (final CloseableRecordBatch crb : operators) { |
| df.suppressingClose(crb); |
| if (logger.isDebugEnabled()) { |
| logger.debug(String.format("closed operator %d", System.identityHashCode(crb))); |
| } |
| } |
| |
| try { |
| df.close(); |
| } catch (Exception e) { |
| fragmentContext.getExecutorState().fail(e); |
| } |
| } |
| } |
| |
| /** |
| * Given a list of operators and a stack trace, walks the stack trace and |
| * the operator list to find the leaf-most operator, which is the one |
| * that was active when the exception was thrown. Handle the cases in |
| * which no operator was active, each operator had multiple methods on |
| * the stack, or the exception was thrown in some class called by |
| * the operator. |
| * <p> |
| * Not all operators leave a mark in the trace. In particular if a the |
| * call stack is only through base-class methods, then we have no way to |
| * know the actual class during the call. This is OK because the leaf |
| * methods are just pass-through operations, they are unlikely to fail. |
| * |
| * @param <T> the type of the operator. Parameterized to allow easier |
| * testing |
| * @param dag the list of operators from root-most to leaf-most |
| * @param e the exception thrown somewhere in the operator tree |
| * @return the leaf-most operator, if any |
| */ |
| public static <T> T findLeaf(List<T> dag, Throwable e) { |
| StackTraceElement[] trace = e.getStackTrace(); |
| for (int i = dag.size() - 1; i >= 0; i--) { |
| T leaf = dag.get(i); |
| String opName = leaf.getClass().getName(); |
| for (StackTraceElement element : trace) { |
| String frameName = element.getClassName(); |
| if (frameName.contentEquals(opName)) { |
| return leaf; |
| } |
| } |
| } |
| return null; |
| } |
| } |