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Example 1 with RuntimeContext

use of io.cdap.cdap.api.RuntimeContext in project cdap by caskdata.

the class MapperWrapper method run.

@SuppressWarnings("unchecked")
@Override
public void run(Context context) throws IOException, InterruptedException {
    MapReduceClassLoader classLoader = MapReduceClassLoader.getFromConfiguration(context.getConfiguration());
    ClassLoader weakReferenceClassLoader = new WeakReferenceDelegatorClassLoader(classLoader);
    BasicMapReduceTaskContext basicMapReduceContext = classLoader.getTaskContextProvider().get(context);
    String program = basicMapReduceContext.getProgramName();
    final MapTaskMetricsWriter mapTaskMetricsWriter = new MapTaskMetricsWriter(basicMapReduceContext.getProgramMetrics(), context);
    // this is a hook for periodic flushing of changes buffered by datasets (to avoid OOME)
    WrappedMapper.Context flushingContext = createAutoFlushingContext(context, basicMapReduceContext, mapTaskMetricsWriter);
    basicMapReduceContext.setHadoopContext(flushingContext);
    InputSplit inputSplit = context.getInputSplit();
    if (inputSplit instanceof MultiInputTaggedSplit) {
        basicMapReduceContext.setInputContext(InputContexts.create((MultiInputTaggedSplit) inputSplit));
    }
    ClassLoader programClassLoader = classLoader.getProgramClassLoader();
    Mapper delegate = createMapperInstance(programClassLoader, getWrappedMapper(context.getConfiguration()), context, program);
    // injecting runtime components, like datasets, etc.
    try {
        Reflections.visit(delegate, delegate.getClass(), new PropertyFieldSetter(basicMapReduceContext.getSpecification().getProperties()), new MetricsFieldSetter(basicMapReduceContext.getMetrics()), new DataSetFieldSetter(basicMapReduceContext));
    } catch (Throwable t) {
        Throwable rootCause = Throwables.getRootCause(t);
        USERLOG.error("Failed to initialize program '{}' with error: {}. Please check the system logs for more details.", program, rootCause.getMessage(), rootCause);
        throw new IOException(String.format("Failed to inject fields to %s", delegate.getClass()), t);
    }
    ClassLoader oldClassLoader;
    if (delegate instanceof ProgramLifecycle) {
        oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
        try {
            ((ProgramLifecycle) delegate).initialize(new MapReduceLifecycleContext(basicMapReduceContext));
        } catch (Exception e) {
            Throwable rootCause = Throwables.getRootCause(e);
            USERLOG.error("Failed to initialize program '{}' with error: {}. Please check the system logs for more " + "details.", program, rootCause.getMessage(), rootCause);
            throw new IOException(String.format("Failed to initialize mapper with %s", basicMapReduceContext), e);
        } finally {
            ClassLoaders.setContextClassLoader(oldClassLoader);
        }
    }
    oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
    try {
        delegate.run(flushingContext);
    } finally {
        ClassLoaders.setContextClassLoader(oldClassLoader);
    }
    // memory by tx agent)
    try {
        basicMapReduceContext.flushOperations();
    } catch (Exception e) {
        throw new IOException("Failed to flush operations at the end of mapper of " + basicMapReduceContext, e);
    }
    // Close all writers created by MultipleOutputs
    basicMapReduceContext.closeMultiOutputs();
    if (delegate instanceof ProgramLifecycle) {
        oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
        try {
            ((ProgramLifecycle<? extends RuntimeContext>) delegate).destroy();
        } catch (Exception e) {
            LOG.error("Error during destroy of mapper {}", basicMapReduceContext, e);
        // Do nothing, try to finish
        } finally {
            ClassLoaders.setContextClassLoader(oldClassLoader);
        }
    }
    // Emit metrics one final time
    mapTaskMetricsWriter.reportMetrics();
}
Also used : ProgramLifecycle(io.cdap.cdap.api.ProgramLifecycle) IOException(java.io.IOException) DataSetFieldSetter(io.cdap.cdap.internal.app.runtime.DataSetFieldSetter) IOException(java.io.IOException) Mapper(org.apache.hadoop.mapreduce.Mapper) WrappedMapper(org.apache.hadoop.mapreduce.lib.map.WrappedMapper) WeakReferenceDelegatorClassLoader(io.cdap.cdap.common.lang.WeakReferenceDelegatorClassLoader) PropertyFieldSetter(io.cdap.cdap.common.lang.PropertyFieldSetter) MetricsFieldSetter(io.cdap.cdap.internal.app.runtime.MetricsFieldSetter) WrappedMapper(org.apache.hadoop.mapreduce.lib.map.WrappedMapper) MultiInputTaggedSplit(io.cdap.cdap.internal.app.runtime.batch.dataset.input.MultiInputTaggedSplit) WeakReferenceDelegatorClassLoader(io.cdap.cdap.common.lang.WeakReferenceDelegatorClassLoader) RuntimeContext(io.cdap.cdap.api.RuntimeContext) InputSplit(org.apache.hadoop.mapreduce.InputSplit) TaggedInputSplit(io.cdap.cdap.internal.app.runtime.batch.dataset.input.TaggedInputSplit)

Example 2 with RuntimeContext

use of io.cdap.cdap.api.RuntimeContext in project cdap by caskdata.

the class ReducerWrapper method run.

@SuppressWarnings("unchecked")
@Override
public void run(Context context) throws IOException, InterruptedException {
    MapReduceClassLoader classLoader = MapReduceClassLoader.getFromConfiguration(context.getConfiguration());
    ClassLoader weakReferenceClassLoader = new WeakReferenceDelegatorClassLoader(classLoader);
    BasicMapReduceTaskContext basicMapReduceContext = classLoader.getTaskContextProvider().get(context);
    long metricsReportInterval = basicMapReduceContext.getMetricsReportIntervalMillis();
    final ReduceTaskMetricsWriter reduceTaskMetricsWriter = new ReduceTaskMetricsWriter(basicMapReduceContext.getProgramMetrics(), context);
    // this is a hook for periodic flushing of changes buffered by datasets (to avoid OOME)
    WrappedReducer.Context flushingContext = createAutoFlushingContext(context, basicMapReduceContext, reduceTaskMetricsWriter);
    basicMapReduceContext.setHadoopContext(flushingContext);
    String userReducer = context.getConfiguration().get(ATTR_REDUCER_CLASS);
    ClassLoader programClassLoader = classLoader.getProgramClassLoader();
    Reducer delegate = createReducerInstance(programClassLoader, userReducer);
    // injecting runtime components, like datasets, etc.
    try {
        Reflections.visit(delegate, delegate.getClass(), new PropertyFieldSetter(basicMapReduceContext.getSpecification().getProperties()), new MetricsFieldSetter(basicMapReduceContext.getMetrics()), new DataSetFieldSetter(basicMapReduceContext));
    } catch (Throwable t) {
        LOG.error("Failed to inject fields to {}.", delegate.getClass(), t);
        throw Throwables.propagate(t);
    }
    ClassLoader oldClassLoader;
    if (delegate instanceof ProgramLifecycle) {
        oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
        try {
            ((ProgramLifecycle) delegate).initialize(new MapReduceLifecycleContext(basicMapReduceContext));
        } catch (Exception e) {
            LOG.error("Failed to initialize reducer with {}", basicMapReduceContext, e);
            throw Throwables.propagate(e);
        } finally {
            ClassLoaders.setContextClassLoader(oldClassLoader);
        }
    }
    oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
    try {
        delegate.run(flushingContext);
    } finally {
        ClassLoaders.setContextClassLoader(oldClassLoader);
    }
    // memory by tx agent)
    try {
        basicMapReduceContext.flushOperations();
    } catch (Exception e) {
        LOG.error("Failed to flush operations at the end of reducer of " + basicMapReduceContext, e);
        throw Throwables.propagate(e);
    }
    // Close all writers created by MultipleOutputs
    basicMapReduceContext.closeMultiOutputs();
    if (delegate instanceof ProgramLifecycle) {
        oldClassLoader = ClassLoaders.setContextClassLoader(weakReferenceClassLoader);
        try {
            ((ProgramLifecycle<? extends RuntimeContext>) delegate).destroy();
        } catch (Exception e) {
            LOG.error("Error during destroy of reducer {}", basicMapReduceContext, e);
        // Do nothing, try to finish
        } finally {
            ClassLoaders.setContextClassLoader(oldClassLoader);
        }
    }
    reduceTaskMetricsWriter.reportMetrics();
}
Also used : ProgramLifecycle(io.cdap.cdap.api.ProgramLifecycle) DataSetFieldSetter(io.cdap.cdap.internal.app.runtime.DataSetFieldSetter) IOException(java.io.IOException) WeakReferenceDelegatorClassLoader(io.cdap.cdap.common.lang.WeakReferenceDelegatorClassLoader) PropertyFieldSetter(io.cdap.cdap.common.lang.PropertyFieldSetter) MetricsFieldSetter(io.cdap.cdap.internal.app.runtime.MetricsFieldSetter) WeakReferenceDelegatorClassLoader(io.cdap.cdap.common.lang.WeakReferenceDelegatorClassLoader) WrappedReducer(org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer) WrappedReducer(org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer) Reducer(org.apache.hadoop.mapreduce.Reducer) RuntimeContext(io.cdap.cdap.api.RuntimeContext)

Aggregations

ProgramLifecycle (io.cdap.cdap.api.ProgramLifecycle)2 RuntimeContext (io.cdap.cdap.api.RuntimeContext)2 PropertyFieldSetter (io.cdap.cdap.common.lang.PropertyFieldSetter)2 WeakReferenceDelegatorClassLoader (io.cdap.cdap.common.lang.WeakReferenceDelegatorClassLoader)2 DataSetFieldSetter (io.cdap.cdap.internal.app.runtime.DataSetFieldSetter)2 MetricsFieldSetter (io.cdap.cdap.internal.app.runtime.MetricsFieldSetter)2 IOException (java.io.IOException)2 MultiInputTaggedSplit (io.cdap.cdap.internal.app.runtime.batch.dataset.input.MultiInputTaggedSplit)1 TaggedInputSplit (io.cdap.cdap.internal.app.runtime.batch.dataset.input.TaggedInputSplit)1 InputSplit (org.apache.hadoop.mapreduce.InputSplit)1 Mapper (org.apache.hadoop.mapreduce.Mapper)1 Reducer (org.apache.hadoop.mapreduce.Reducer)1 WrappedMapper (org.apache.hadoop.mapreduce.lib.map.WrappedMapper)1 WrappedReducer (org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer)1