KAFKA-5157: Options for handling corrupt data during deserialization #3423

enothereska · 2017-06-23T13:35:00Z

This is the implementation of KIP-161: https://cwiki.apache.org/confluence/display/KAFKA/KIP-161%3A+streams+deserialization+exception+handlers

enothereska · 2017-06-23T13:35:14Z

More tests coming, but basic structure should be in place.

asfgit · 2017-06-23T14:31:03Z

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asfgit · 2017-06-23T14:34:38Z

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enothereska · 2017-06-23T15:17:52Z

@mjsax @dguy @bbejeck @guozhangwang this is the implementation for KIP-161. Have a look when you can. Thanks.

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asfgit · 2017-06-23T16:43:22Z

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mjsax

Thanks for the patch. Some minor comments.

mjsax · 2017-06-24T23:02:06Z

streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java

@@ -239,6 +241,13 @@
    private static final String STATE_DIR_DOC = "Directory location for state store.";

    /**
+     * {@code default.deserialization.exception.handler}


Nit: Can you please add this in alphabetic order. Thx.

mjsax · 2017-06-24T23:02:06Z

streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java

@@ -339,6 +348,11 @@
                    CommonClientConfigs.DEFAULT_SECURITY_PROTOCOL,
                    Importance.MEDIUM,
                    CommonClientConfigs.SECURITY_PROTOCOL_DOC)
+            .define(DEFAULT_DESERIALIZATION_EXCEPTION_HANDLER_CLASS_CONFIG,


Nit. As above. Alphabetic within the "medium" group.

mjsax · 2017-06-24T23:02:06Z

streams/src/main/java/org/apache/kafka/streams/StreamsConfig.java

@@ -339,6 +348,11 @@
                    CommonClientConfigs.DEFAULT_SECURITY_PROTOCOL,
                    Importance.MEDIUM,
                    CommonClientConfigs.SECURITY_PROTOCOL_DOC)
+            .define(DEFAULT_DESERIALIZATION_EXCEPTION_HANDLER_CLASS_CONFIG,
+                Type.CLASS,
+                LogAndFailExceptionHandler.class.getName(),


Nit: remove getName()

They all have getName. Should I remove all? Otherwise it will look inconsistent.

Sounds good to me. Not sure why we started with this annoying .getName() in the first place...

mjsax · 2017-06-24T23:02:06Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndContinueExceptionHandler.java

+    private static final Logger log = LoggerFactory.getLogger(StreamThread.class);
+
+    @Override
+    public DeserializationHandlerResponse handle(ProcessorContext context,


Nit: add final

mjsax · 2017-06-24T23:02:06Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndContinueExceptionHandler.java

+    }
+
+    @Override
+    public void configure(Map<String, ?> configs) {


mjsax · 2017-06-24T23:02:06Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/GlobalStateTaskTest.java

@@ -129,6 +135,55 @@ public void shouldProcessRecordsForOtherTopic() throws Exception {
        assertEquals(0, sourceOne.numReceived);
    }

+    @Test(expected = StreamsException.class)


We should not use expected here but try { globalStateTask.update(...); fail(...): } catch(ignore) {} pattern. Also, the ConsumerRecord() should be instantiated outside/before the try-catch blog.

mjsax · 2017-06-24T23:02:06Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/GlobalStateTaskTest.java

+    }
+
+
+    @Test(expected = StreamsException.class)


mjsax · 2017-06-24T23:02:06Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/RecordQueueTest.java

    @Test(expected = StreamsException.class)
    public void shouldThrowOnNegativeTimestamp() {
        final List<ConsumerRecord<byte[], byte[]>> records = Collections.singletonList(
                new ConsumerRecord<>("topic", 1, 1, -1L, TimestampType.CREATE_TIME, 0L, 0, 0, recordKey, recordValue));

        final RecordQueue queue = new RecordQueue(new TopicPartition(topics[0], 1),
                                                          new MockSourceNode<>(topics, intDeserializer, intDeserializer),
-                                                          new FailOnInvalidTimestamp());
+                                                          new FailOnInvalidTimestamp(), new LogAndContinueExceptionHandler(), null);


Nit: please one argument per line.

mjsax · 2017-06-24T23:02:06Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/RecordQueueTest.java

@@ -158,7 +189,7 @@ public void shouldDropOnNegativeTimestamp() {

        final RecordQueue queue = new RecordQueue(new TopicPartition(topics[0], 1),
                                                  new MockSourceNode<>(topics, intDeserializer, intDeserializer),
-                                                  new LogAndSkipOnInvalidTimestamp());
+                                                  new LogAndSkipOnInvalidTimestamp(), new LogAndContinueExceptionHandler(), null);


mjsax · 2017-06-24T23:02:06Z

streams/src/test/java/org/apache/kafka/test/ProcessorTopologyTestDriver.java

@@ -205,7 +206,7 @@ public ProcessorTopologyTestDriver(final StreamsConfig config,
            final GlobalStateManagerImpl stateManager = new GlobalStateManagerImpl(globalTopology, globalConsumer, stateDirectory);
            globalStateTask = new GlobalStateUpdateTask(globalTopology,
                                                        new GlobalProcessorContextImpl(config, stateManager, streamsMetrics, cache),
-                                                        stateManager
+                                                        stateManager, new LogAndContinueExceptionHandler()


Guess you missed this one :)

…zation-exceptions

asfgit · 2017-06-26T14:19:46Z

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enothereska · 2017-07-03T08:06:16Z

@dguy @guozhangwang any further comments? Thanks.

dguy

Thanks @enothereska - i've left a few comments

dguy · 2017-07-03T10:20:29Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndContinueExceptionHandler.java

+                                                 final Exception exception) {
+
+        log.warn("Deserialization exception {}. Processor context is {} and record is {}",
+            exception.toString(), context, record);


do we want the exception stacktrace?

dguy · 2017-07-03T10:20:29Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndFailExceptionHandler.java

+                                                 final ConsumerRecord<byte[], byte[]> record,
+                                                 final Exception exception) {
+
+        log.warn("Deserialization exception {}. Processor context is {} and record is {}",


dguy · 2017-07-03T10:20:29Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+        } catch (Exception e) {
+            DeserializationExceptionHandler.DeserializationHandlerResponse response =
+                deserializationExceptionHandler.handle(processorContext, rawRecord, e);
+            if (response.id == DeserializationExceptionHandler.DeserializationHandlerResponse.FAIL.id) {


Why not just if(response == DeserializationExceptionHandler.DeserializationHandlerResponse.FAIL) ?

dguy · 2017-07-03T10:20:29Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+        try {
+            return deserialize(rawRecord);
+        } catch (Exception e) {
+            DeserializationExceptionHandler.DeserializationHandlerResponse response =


nit: final

dguy · 2017-07-03T10:20:29Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+        // catch and process if we have a deserialization handler
+        try {
+            return deserialize(rawRecord);
+        } catch (Exception e) {


Should we add a metric for records skipped due to deserialization errors?

Yes good idea. I'll piggyback on this KIP.

dguy · 2017-07-03T10:20:29Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/GlobalStateTaskTest.java

+                                  final byte[] key,
+                                  final byte[] recordValue,
+                                  boolean failExpected) {
+        ConsumerRecord record = new ConsumerRecord<>("t2", 1, 1,


nit: final

dguy · 2017-07-03T10:20:29Z

streams/src/test/java/org/apache/kafka/streams/processor/internals/RecordQueueTest.java

@@ -140,14 +142,45 @@ public void shouldThrowStreamsExceptionWhenValueDeserializationFails() throws Ex
        queue.addRawRecords(records);
    }

+    @Test
+    public void shouldNotThrowStreamsExceptionWhenKeyDeserializationFailsWithSkipHandler() throws Exception {
+        RecordQueue queue = new RecordQueue(new TopicPartition(topics[0], 1),


maybe extract to a field as it is also used in the test below

dguy · 2017-07-03T10:20:29Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+    public ConsumerRecord<Object, Object> tryDeserialize(final ProcessorContext processorContext,
+                                                         ConsumerRecord<byte[], byte[]> rawRecord) {
+
+        if (deserializationExceptionHandler == null) {


Can we assume and/or ensure that this is non-null? Then we won't need this check here and can just have a single path through this method. I think we default to LogAndFail... if nothing is set - right?

…zation-exceptions

asfgit · 2017-07-04T09:15:19Z

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enothereska · 2017-07-04T09:25:40Z

Thanks @dguy

asfgit · 2017-07-04T10:25:07Z

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asfgit · 2017-07-04T10:52:32Z

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dguy

Thanks @enothereska. I've left one comment. I think the only other thing remaining is whether or not we should implement the pattern for setting state that @guozhangwang suggested

dguy · 2017-07-04T14:02:23Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndContinueExceptionHandler.java

+    public DeserializationHandlerResponse handle(final ProcessorContext context,
+                                                 final ConsumerRecord<byte[], byte[]> record,
+                                                 final Exception exception) {
+        StringWriter sWriter = new StringWriter();


You can just pass the exception as the last parameter to i.e, log.warn(" p1: {} p2: {}", p1, p2, exception)

Also, just realised that ProcessorContextImpl doesn't have a toString. Perhaps we just need to log the taskId, topic, partition, and offset? i.e.,
log.warn("Exception caught during Deserialization, taskId: {}, topic:{}, partition:{}, offset:{}", context.taskId(), record.topic(), record.partition(), record.offset(), exception)

Same in the other exception handler

If I pass just the exception, it reverts to exception.toString(). It won't print the stack trace. As a typical NPE example:

with just exception passed: java.lang.NullPointerException

with stack trace:```
java.lang.NullPointerException
at org.rocksdb.RocksDB.get(RocksDB.java:791)
at org.apache.kafka.streams.state.internals.RocksDBStore.getInternal(RocksDBStore.java:235)
at org.apache.kafka.streams.state.internals.RocksDBStore.get(RocksDBStore.java:219)
at org.apache.kafka.streams.state.internals.ChangeLoggingKeyValueBytesStore.delete(ChangeLoggingKeyValueBytesStore.java:80)
at org.apache.kafka.streams.state.internals.ChangeLoggingKeyValueStore.delete(ChangeLoggingKeyValueStore.java:96)

Shall we add a toString to ProcessorContextImpl? That sounds useful.

@enothereska

If I pass just the exception, it reverts to exception.toString(). It won't print the stack trace.

My guess is that you are adding a {} for the exception, in which case it probably will just print the string. You don't need to add it. For example, from another one we have:
log.warn("{} Failed offset commits {}: ", logPrefix, consumedOffsetsAndMetadata, e)

Having toString on ProcessorContextImpl might be useful, but it also might be too much information for this particular log message

enothereska · 2017-07-04T14:51:31Z

I've left one comment. I think the only other thing remaining is whether or not we should implement the pattern for setting state.

Thanks @dguy I'm not sure what this refers to. I looked back but I don't see @guozhangwang 's comment. Could you elaborate? Thanks.

dguy · 2017-07-04T15:00:12Z

@enothereska doh! I've got my PRs crossed! ignore me

asfgit · 2017-07-05T10:00:03Z

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dguy

1 more comment otherwise LGTM. @mjsax can you please make another pass over it?

dguy · 2017-07-05T10:20:39Z

streams/src/main/java/org/apache/kafka/streams/processor/internals/RecordQueue.java

@@ -80,8 +88,14 @@ public TopicPartition partition() {
     * @return the size of this queue
     */
    public int addRawRecords(Iterable<ConsumerRecord<byte[], byte[]>> rawRecords) {
+        ConsumerRecord<Object, Object> record = null;


I don't see any reason for this variable to not be declared inside the loop as it was previously

asfgit · 2017-07-05T10:24:26Z

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asfgit · 2017-07-05T14:25:25Z

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mjsax

Some comments.

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/DeserializationExceptionHandler.java

+import org.apache.kafka.common.Configurable;
+import org.apache.kafka.streams.processor.ProcessorContext;
+
+public interface DeserializationExceptionHandler extends Configurable {


We should have proper class JavaDocs for all public interfaces.

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/DeserializationExceptionHandler.java

+
+public interface DeserializationExceptionHandler extends Configurable {
+    /**
+     * Inspect a record and the exception received


Nit: . missing at the end

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/DeserializationExceptionHandler.java

+        public final short id;
+
+        DeserializationHandlerResponse(int id, String name) {
+            this.id = (short) id;


iIf we go with short, the parameter should be short, too?

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/DeserializationExceptionHandler.java

+        /** the permanent and immutable id of an API--this can't change ever */
+        public final short id;
+
+        DeserializationHandlerResponse(int id, String name) {


nit: add final

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndContinueExceptionHandler.java

+                                                 final Exception exception) {
+
+        log.warn("Exception caught during Deserialization, " +
+                "taskId: {}, topic:{}, partition:{}, offset:{}",


Nit: some whitespaces are missing

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/errors/LogAndFailExceptionHandler.java

+                                                 final Exception exception) {
+
+        log.warn("Exception caught during Deserialization, " +
+                        "taskId: {}, topic:{}, partition:{}, offset:{}",


Nit: fix indention and some whitespaces are missing

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/processor/internals/GlobalStateUpdateTask.java

@@ -63,7 +56,7 @@ public GlobalStateUpdateTask(final ProcessorTopology topology,
        for (final String storeName : storeNames) {
            final String sourceTopic = storeNameToTopic.get(storeName);
            final SourceNode source = topology.source(sourceTopic);
-            deserializers.put(sourceTopic, new SourceNodeAndDeserializer(source, new SourceNodeRecordDeserializer(source)));
+            deserializers.put(sourceTopic, new SourceNodeRecordDeserializer(source, this.deserializationExceptionHandler));


Nit: remove this

mjsax · 2017-07-05T20:24:27Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+            final DeserializationExceptionHandler.DeserializationHandlerResponse response =
+                deserializationExceptionHandler.handle(processorContext, rawRecord, e);
+            if (response == DeserializationExceptionHandler.DeserializationHandlerResponse.FAIL) {
+                throw e;


Should we wrap this with a StreamsException? This way, we could add a detailed error message and explain in the msg text that uses can set a different exception handler etc (similar to timestamp extractor?) -- so users don't need to ask at the mailing list :)

mjsax · 2017-07-05T20:24:27Z

streams/src/test/java/org/apache/kafka/test/ProcessorTopologyTestDriver.java

@@ -205,7 +206,7 @@ public ProcessorTopologyTestDriver(final StreamsConfig config,
            final GlobalStateManagerImpl stateManager = new GlobalStateManagerImpl(globalTopology, globalConsumer, stateDirectory);
            globalStateTask = new GlobalStateUpdateTask(globalTopology,
                                                        new GlobalProcessorContextImpl(config, stateManager, streamsMetrics, cache),
-                                                        stateManager
+                                                        stateManager, new LogAndContinueExceptionHandler()


Guess you missed this one :)

mjsax · 2017-07-05T20:24:27Z

streams/src/main/java/org/apache/kafka/streams/processor/internals/ProcessorNode.java

@@ -186,6 +187,8 @@ public NodeMetrics(StreamsMetrics metrics, String name, String sensorNamePrefix)
            this.nodeCreationSensor = metrics.addLatencyAndThroughputSensor(scope, sensorNamePrefix + "." + name, "create", Sensor.RecordingLevel.DEBUG, tagKey, tagValue);
            this.nodeDestructionSensor = metrics.addLatencyAndThroughputSensor(scope, sensorNamePrefix + "." + name, "destroy", Sensor.RecordingLevel.DEBUG, tagKey, tagValue);
            this.sourceNodeForwardSensor = metrics.addThroughputSensor(scope, sensorNamePrefix + "." + name, "forward", Sensor.RecordingLevel.DEBUG, tagKey, tagValue);
+            this.sourceNodeSkippedDueToDeserializationError = metrics.addThroughputSensor(scope, sensorNamePrefix + "." + name, "skippedDueToDeserializationError", Sensor.RecordingLevel.DEBUG, tagKey, tagValue);
+


Nit: remove empty line

asfgit · 2017-07-06T09:37:11Z

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asfgit · 2017-07-07T09:42:44Z

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enothereska · 2017-07-07T09:44:37Z

Could not write standard input into: Gradle build daemon

enothereska · 2017-07-07T09:44:43Z

retest this please

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enothereska · 2017-07-07T10:46:04Z

org.apache.kafka.streams.integration.QueryableStateIntegrationTest.shouldAllowToQueryAfterThreadDied failed. There is already a JIRA for it https://issues.apache.org/jira/browse/KAFKA-5566.

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enothereska · 2017-07-07T11:01:24Z

@dguy I don't have anything else to add to this. Fixing the QueryableState in separate PR. Thanks. Also I just merged with trunk.

…zation-exceptions

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enothereska · 2017-07-10T08:43:55Z

@guozhangwang any more comments?

dguy · 2017-07-10T17:13:38Z

retest this please

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dguy

Thanks @enothereska, LGTM

guozhangwang

Left some comments on this PR. Sorry for the late reply.

guozhangwang · 2017-07-10T20:06:44Z

...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

+                sourceNode.nodeMetrics.sourceNodeSkippedDueToDeserializationError.record();
+            }
+        }
+        return null;


Initial implementation

a9892b3

More tests

a2210a6

enothereska changed the title ~~KAFKA-5157: Options for handling corrupt data during deserialization [WiP]~~ KAFKA-5157: Options for handling corrupt data during deserialization Jun 23, 2017

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...src/main/java/org/apache/kafka/streams/processor/internals/SourceNodeRecordDeserializer.java

sourceNode.nodeMetrics.sourceNodeSkippedDueToDeserializationError.record();

}

}

return null;

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guozhangwang Jul 10, 2017

KAFKA-5157: Options for handling corrupt data during deserialization #3423

KAFKA-5157: Options for handling corrupt data during deserialization #3423

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enothereska commented Jun 23, 2017

enothereska commented Jun 23, 2017

asfgit commented Jun 23, 2017

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asfgit commented Jun 26, 2017

asfgit commented Jun 26, 2017

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asfgit commented Jul 4, 2017

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enothereska commented Jul 4, 2017 • edited

dguy commented Jul 4, 2017

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asfgit commented Jul 6, 2017

asfgit commented Jul 6, 2017

asfgit commented Jul 7, 2017

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enothereska commented Jul 7, 2017

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asfgit commented Jul 7, 2017

enothereska commented Jul 4, 2017 •

edited

enothereska commented Jul 7, 2017 •

edited