1. create mysql table like
CREATE TABLE `test` ( `a` tinyint(4) NOT NULL DEFAULT '0', `b` decimal(12,0) DEFAULT NULL, `c` decimal(5,0) DEFAULT NULL ) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
2. start kafka connect using Debezium mysql plugin
{
"name": "inventory-connector",
"config": {
"connector.class": "io.debezium.connector.mysql.MySqlConnector",
"tasks.max": "1",
"database.hostname": "localhost",
"database.port": "3306",
"database.user": "root",
"database.password": "root",
"database.server.id": "223344",
"database.server.name": "localhost",
"database.whitelist": "inventory",
"table.whitelist":"inventory.test",
"database.history.kafka.bootstrap.servers": "localhost:9092",
"database.history.kafka.topic": "schema-changes.inventory",
"include.schema.changes":"false",
"transforms": "extractField",
"transforms.extractField.type": "com.centchain.kafka.connect.mysql.DebeziumMysql$Value",
"transforms.extractField.field": "after"
}
}
3. get errors:
[2019-05-09 15:23:10,310] INFO WorkerSourceTask{id=cashier-201905091402-0} flushing 0 outstanding messages for offset commit (org.apache.kafka.connect.runtime.WorkerSourceTask:414) [2019-05-09 15:23:10,311] ERROR WorkerSourceTask{id=cashier-201905091402-0} Task threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:177) org.apache.kafka.connect.errors.ConnectException: Tolerance exceeded in error handler at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndHandleError(RetryWithToleranceOperator.java:178) at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execute(RetryWithToleranceOperator.java:104) at org.apache.kafka.connect.runtime.WorkerSourceTask.convertTransformedRecord(WorkerSourceTask.java:269) at org.apache.kafka.connect.runtime.WorkerSourceTask.sendRecords(WorkerSourceTask.java:293) at org.apache.kafka.connect.runtime.WorkerSourceTask.execute(WorkerSourceTask.java:228) at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:175) at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:219) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.avro.AvroRuntimeException: Unknown datum class: class java.lang.Short at org.apache.avro.util.internal.JacksonUtils.toJson(JacksonUtils.java:87) at org.apache.avro.util.internal.JacksonUtils.toJsonNode(JacksonUtils.java:48) at org.apache.avro.Schema$Field.<init>(Schema.java:423) at org.apache.avro.Schema$Field.<init>(Schema.java:415) at io.confluent.connect.avro.AvroData.addAvroRecordField(AvroData.java:964) at io.confluent.connect.avro.AvroData.fromConnectSchema(AvroData.java:847) at io.confluent.connect.avro.AvroData.fromConnectSchema(AvroDa」
4. fix
file location: avro-release-1.8.1/lang/java/avro/src/main/java/org/apache/avro/util/internal/JacksonUtils.java
1 /** 2 * Licensed to the Apache Software Foundation (ASF) under one 3 * or more contributor license agreements. See the NOTICE file 4 * distributed with this work for additional information 5 * regarding copyright ownership. The ASF licenses this file 6 * to you under the Apache License, Version 2.0 (the 7 * "License"); you may not use this file except in compliance 8 * with the License. You may obtain a copy of the License at 9 * 10 * http://www.apache.org/licenses/LICENSE-2.0 11 * 12 * Unless required by applicable law or agreed to in writing, software 13 * distributed under the License is distributed on an "AS IS" BASIS, 14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15 * See the License for the specific language governing permissions and 16 * limitations under the License. 17 */ 18 package org.apache.avro.util.internal; 19 20 import java.io.IOException; 21 import java.io.UnsupportedEncodingException; 22 import java.math.BigDecimal; 23 import java.util.ArrayList; 24 import java.util.Collection; 25 import java.util.Iterator; 26 import java.util.LinkedHashMap; 27 import java.util.List; 28 import java.util.Map; 29 import org.apache.avro.AvroRuntimeException; 30 import org.apache.avro.JsonProperties; 31 import org.apache.avro.Schema; 32 import org.codehaus.jackson.JsonGenerator; 33 import org.codehaus.jackson.JsonNode; 34 import org.codehaus.jackson.map.ObjectMapper; 35 import org.codehaus.jackson.util.TokenBuffer; 36 37 public class JacksonUtils { 38 static final String BYTES_CHARSET = "ISO-8859-1"; 39 40 private JacksonUtils() { 41 } 42 43 public static JsonNode toJsonNode(Object datum) { 44 if (datum == null) { 45 return null; 46 } 47 try { 48 TokenBuffer generator = new TokenBuffer(new ObjectMapper()); 49 toJson(datum, generator); 50 return new ObjectMapper().readTree(generator.asParser()); 51 } catch (IOException e) { 52 throw new AvroRuntimeException(e); 53 } 54 } 55 56 @SuppressWarnings(value="unchecked") 57 static void toJson(Object datum, JsonGenerator generator) throws IOException { 58 if (datum == JsonProperties.NULL_VALUE) { // null 59 generator.writeNull(); 60 } else if (datum instanceof Map) { // record, map 61 generator.writeStartObject(); 62 for (Map.Entry<Object,Object> entry : ((Map<Object,Object>) datum).entrySet()) { 63 generator.writeFieldName(entry.getKey().toString()); 64 toJson(entry.getValue(), generator); 65 } 66 generator.writeEndObject(); 67 } else if (datum instanceof Collection) { // array 68 generator.writeStartArray(); 69 for (Object element : (Collection<?>) datum) { 70 toJson(element, generator); 71 } 72 generator.writeEndArray(); 73 } else if (datum instanceof byte[]) { // bytes, fixed 74 generator.writeString(new String((byte[]) datum, BYTES_CHARSET)); 75 } else if (datum instanceof CharSequence || datum instanceof Enum<?>) { // string, enum 76 generator.writeString(datum.toString()); 77 } else if (datum instanceof Double) { // double 78 generator.writeNumber((Double) datum); 79 } else if (datum instanceof Float) { // float 80 generator.writeNumber((Float) datum); 81 } else if (datum instanceof Long) { // long 82 generator.writeNumber((Long) datum); 83 } else if (datum instanceof Integer) { // int 84 generator.writeNumber((Integer) datum); 85 }else if ( datum instanceof Short) { // short 86 generator.writeNumber(new Integer(datum.toString())); 87 }else if (datum instanceof Boolean) { // boolean 88 generator.writeBoolean((Boolean) datum); 89 } 90 else if (datum instanceof BigDecimal){ 91 generator.writeNumber((BigDecimal) datum); 92 } else { 93 throw new AvroRuntimeException("Unknown datum class: " + datum.getClass()); 94 } 95 } 96 97 public static Object toObject(JsonNode jsonNode) { 98 return toObject(jsonNode, null); 99 } 100 101 public static Object toObject(JsonNode jsonNode, Schema schema) { 102 if (schema != null && schema.getType().equals(Schema.Type.UNION)) { 103 return toObject(jsonNode, schema.getTypes().get(0)); 104 } 105 if (jsonNode == null) { 106 return null; 107 } else if (jsonNode.isNull()) { 108 return JsonProperties.NULL_VALUE; 109 } else if (jsonNode.isBoolean()) { 110 return jsonNode.asBoolean(); 111 } else if (jsonNode.isInt()) { 112 if (schema == null || schema.getType().equals(Schema.Type.INT)) { 113 return jsonNode.asInt(); 114 } else if (schema.getType().equals(Schema.Type.LONG)) { 115 return jsonNode.asLong(); 116 } 117 }else if (jsonNode.isBigDecimal()){ 118 return jsonNode.asDouble(); 119 }else if (jsonNode.isLong()) { 120 return jsonNode.asLong(); 121 } else if (jsonNode.isDouble()) { 122 if (schema == null || schema.getType().equals(Schema.Type.DOUBLE)) { 123 return jsonNode.asDouble(); 124 } else if (schema.getType().equals(Schema.Type.FLOAT)) { 125 return (float) jsonNode.asDouble(); 126 } 127 } else if (jsonNode.isTextual()) { 128 if (schema == null || schema.getType().equals(Schema.Type.STRING) || 129 schema.getType().equals(Schema.Type.ENUM)) { 130 return jsonNode.asText(); 131 } else if (schema.getType().equals(Schema.Type.BYTES)) { 132 try { 133 return jsonNode.getTextValue().getBytes(BYTES_CHARSET); 134 } catch (UnsupportedEncodingException e) { 135 throw new AvroRuntimeException(e); 136 } 137 } 138 } else if (jsonNode.isArray()) { 139 List l = new ArrayList(); 140 for (JsonNode node : jsonNode) { 141 l.add(toObject(node, schema == null ? null : schema.getElementType())); 142 } 143 return l; 144 } else if (jsonNode.isObject()) { 145 Map m = new LinkedHashMap(); 146 for (Iterator<String> it = jsonNode.getFieldNames(); it.hasNext(); ) { 147 String key = it.next(); 148 Schema s = null; 149 if (schema == null) { 150 s = null; 151 } else if (schema.getType().equals(Schema.Type.MAP)) { 152 s = schema.getValueType(); 153 } else if (schema.getType().equals(Schema.Type.RECORD)) { 154 s = schema.getField(key).schema(); 155 } 156 Object value = toObject(jsonNode.get(key), s); 157 m.put(key, value); 158 } 159 return m; 160 } 161 return null; 162 } 163 }
The key is in
line 85-86 which fix error for short
line 90-91,117-118 which fix error for BigDecimal
5. result:
5.1 mysql -> kafka
lenmom@M1701:~/workspace/software/confluent-community-5.1.0-2.11$ bin/kafka-avro-console-consumer --bootstrap-server 127.0.0.1:9092 --from-beginning --topic localhost.a.test {"a":1,"b":{"bytes":"\u0001"},"c":{"bytes":"\u0001"},"operation_type":"c","pt_log_d":"20190513","last_update_timestamp":1557676877029} {"a":1,"b":{"bytes":"\u0001"},"c":{"bytes":"\u0002"},"operation_type":"c","pt_log_d":"20190513","last_update_timestamp":1557676877029} {"a":1,"b":{"bytes":"\u0001"},"c":{"bytes":"\u0003"},"operation_type":"c","pt_log_d":"20190513","last_update_timestamp":1557676877029} {"a":1,"b":{"bytes":"\u0001"},"c":{"bytes":"\u0004"},"operation_type":"c","pt_log_d":"20190513","last_update_timestamp":1557676877029}
5.2 kafka-hive
command config for connector:
{ "name": "hive-sink", "config": { "connector.class": "io.confluent.connect.hdfs.HdfsSinkConnector", "tasks.max": "1", "topics": "localhost.a.test", "hdfs.url": "hdfs://127.0.0.1:9000/", "logs.dir": "/logs", "topics.dir": "/inventory/", "hadoop.conf.dir": "/home/lenmom/workspace/software/hadoop-2.7.3/etc/hadoop/", "flush.size": "1", "rotate.interval.ms": "5000", "hive.integration": true, "hive.database": "inventory", "partitioner.class":"io.confluent.connect.hdfs.partitioner.FieldPartitioner", "partition.field.name":"pt_log_d", "hive.metastore.uris": "thrift://127.0.0.1:9083", "schema.compatibility": "BACKWARD" } }
result:
hive> select * from localhost_a_test; OK 1 1 1 c 20190513 2019-05-13 00:01:17.029 1 1 2 c 20190513 2019-05-13 00:01:17.029 1 1 3 c 20190513 2019-05-13 00:01:17.029 1 1 4 c 20190513 2019-05-13 00:01:17.029 Time taken: 0.168 seconds, Fetched: 4 row(s)
6. for table schema
CREATE TABLE `decimalTest` ( `POINTSDAY` decimal(12,0) NOT NULL DEFAULT '0' , `POINTSMONTH` decimal(12,0) NOT NULL DEFAULT '0' , `CASHDAY` decimal(12,0) NOT NULL DEFAULT '0' , `CASHMONTH` decimal(12,0) NOT NULL DEFAULT '0' ) insert into decimalTest values(1,2,3);
if we use hdfs-connector to sink to hive, we would get error like
[2019-05-16 11:35:18,623] ERROR WorkerSinkTask{id=hive-sink-0} Task threw an uncaught and unrecoverable exception (org.apache.kafka.connect.runtime.WorkerTask:177) org.apache.kafka.connect.errors.ConnectException: Tolerance exceeded in error handler at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndHandleError(RetryWithToleranceOperator.java:178) at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execute(RetryWithToleranceOperator.java:104) at org.apache.kafka.connect.runtime.WorkerSinkTask.convertAndTransformRecord(WorkerSinkTask.java:514) at org.apache.kafka.connect.runtime.WorkerSinkTask.convertMessages(WorkerSinkTask.java:491) at org.apache.kafka.connect.runtime.WorkerSinkTask.poll(WorkerSinkTask.java:322) at org.apache.kafka.connect.runtime.WorkerSinkTask.iteration(WorkerSinkTask.java:226) at org.apache.kafka.connect.runtime.WorkerSinkTask.execute(WorkerSinkTask.java:194) at org.apache.kafka.connect.runtime.WorkerTask.doRun(WorkerTask.java:175) at org.apache.kafka.connect.runtime.WorkerTask.run(WorkerTask.java:219) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Caused by: org.apache.kafka.connect.errors.SchemaBuilderException: Invalid default value at org.apache.kafka.connect.data.SchemaBuilder.defaultValue(SchemaBuilder.java:131) at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1623) at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1500) at io.confluent.connect.avro.AvroData.toConnectSchema(AvroData.java:1368) at io.confluent.connect.avro.AvroData.toConnectData(AvroData.java:1080) at io.confluent.connect.avro.AvroConverter.toConnectData(AvroConverter.java:89) at org.apache.kafka.connect.runtime.WorkerSinkTask.lambda$convertAndTransformRecord$1(WorkerSinkTask.java:514) at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndRetry(RetryWithToleranceOperator.java:128) at org.apache.kafka.connect.runtime.errors.RetryWithToleranceOperator.execAndHandleError(RetryWithToleranceOperator.java:162) ... 13 more Caused by: org.apache.kafka.connect.errors.DataException: Invalid value: null used for required field: "null", schema type: BYTES at org.apache.kafka.connect.data.ConnectSchema.validateValue(ConnectSchema.java:220) at org.apache.kafka.connect.data.ConnectSchema.validateValue(ConnectSchema.java:213) at org.apache.kafka.connect.data.SchemaBuilder.defaultValue(SchemaBuilder.java:129) ... 21 more [2019-05-16 11:35:18,624] ERROR WorkerSinkTask{id=hive-sink-0} Task is being killed and will not recover until manually restarted (org.apache.kafka.connect.runtime.WorkerTask:178)
which is caused by serialization decimal using kafka-avro-convertor error.
To fix this error, I added logic
6.1 /schema-registry-5.1.0/avro-converter/src/main/java/io/confluent/connect/avro/AvroData.java
1 private Object defaultValueFromAvro(Schema schema, 2 org.apache.avro.Schema avroSchema, 3 Object value, 4 ToConnectContext toConnectContext) { 5 // The type will be JsonNode if this default was pulled from a Connect default field, or an 6 // Object if it's the actual Avro-specified default. If it's a regular Java object, we can 7 // use our existing conversion tools. 8 if (!(value instanceof JsonNode)) { 9 return toConnectData(schema, value, toConnectContext); 10 } 11 12 JsonNode jsonValue = (JsonNode) value; 13 switch (avroSchema.getType()) { 14 case INT: 15 if (schema.type() == Schema.Type.INT8) { 16 return (byte) jsonValue.getIntValue(); 17 } else if (schema.type() == Schema.Type.INT16) { 18 return (short) jsonValue.getIntValue(); 19 } else if (schema.type() == Schema.Type.INT32) { 20 return jsonValue.getIntValue(); 21 } else { 22 break; 23 } 24 25 case LONG: 26 return jsonValue.getLongValue(); 27 28 case FLOAT: 29 return (float) jsonValue.getDoubleValue(); 30 case DOUBLE: 31 return jsonValue.getDoubleValue(); 32 33 case BOOLEAN: 34 return jsonValue.asBoolean(); 35 36 case NULL: 37 return null; 38 39 case STRING: 40 case ENUM: 41 return jsonValue.asText(); 42 43 case BYTES: 44 return jsonValue.getDecimalValue(); 45 case FIXED: 46 try { 47 return jsonValue.getBinaryValue(); 48 } catch (IOException e) { 49 throw new DataException("Invalid binary data in default value"); 50 } 51 // return convertIntegerToBytes(jsonValue.getIntValue()); 52 // return jsonValue.getIntValue(); 53 54 case ARRAY: { 55 if (!jsonValue.isArray()) { 56 throw new DataException("Invalid JSON for array default value: " + jsonValue.toString()); 57 } 58 List<Object> result = new ArrayList<>(jsonValue.size()); 59 for (JsonNode elem : jsonValue) { 60 result.add( 61 defaultValueFromAvro(schema, avroSchema.getElementType(), elem, toConnectContext)); 62 } 63 return result; 64 } 65 66 case MAP: { 67 if (!jsonValue.isObject()) { 68 throw new DataException("Invalid JSON for map default value: " + jsonValue.toString()); 69 } 70 Map<String, Object> result = new HashMap<>(jsonValue.size()); 71 Iterator<Map.Entry<String, JsonNode>> fieldIt = jsonValue.getFields(); 72 while (fieldIt.hasNext()) { 73 Map.Entry<String, JsonNode> field = fieldIt.next(); 74 Object converted = defaultValueFromAvro( 75 schema, avroSchema.getElementType(), field.getValue(), toConnectContext); 76 result.put(field.getKey(), converted); 77 } 78 return result; 79 } 80 81 case RECORD: { 82 if (!jsonValue.isObject()) { 83 throw new DataException("Invalid JSON for record default value: " + jsonValue.toString()); 84 } 85 86 Struct result = new Struct(schema); 87 for (org.apache.avro.Schema.Field avroField : avroSchema.getFields()) { 88 Field field = schema.field(avroField.name()); 89 JsonNode fieldJson = ((JsonNode) value).get(field.name()); 90 Object converted = defaultValueFromAvro( 91 field.schema(), avroField.schema(), fieldJson, toConnectContext); 92 result.put(avroField.name(), converted); 93 } 94 return result; 95 } 96 97 case UNION: { 98 // Defaults must match first type 99 org.apache.avro.Schema memberAvroSchema = avroSchema.getTypes().get(0); 100 if (memberAvroSchema.getType() == org.apache.avro.Schema.Type.NULL) { 101 return null; 102 } else { 103 return defaultValueFromAvro( 104 schema.field(unionMemberFieldName(memberAvroSchema)).schema(), 105 memberAvroSchema, 106 value, 107 toConnectContext); 108 } 109 } 110 default: { 111 return null; 112 } 113 } 114 return null; 115 }
after the fix, rebuild the jar and replace the file kafka-connect-avro-converter-5.1.0.jar in confluent kafka installation dir.
then the data should be able to sink to hive now.
hive> select * from decimalTest limit 10; [WARNING] Avro: Invalid default for field POINTSDAY: 0 not a {"type":"bytes","scale":0,"precision":12,"connect.version":1,"connect.parameters":{"scale":"0","connect.decimal.precision":"12"},"connect.default":"AA==","connect.name":"org.apache.kafka.connect.data.Decimal","logicalType":"decimal"} [WARNING] Avro: Invalid default for field POINTSMONTH: 0 not a {"type":"bytes","scale":0,"precision":12,"connect.version":1,"connect.parameters":{"scale":"0","connect.decimal.precision":"12"},"connect.default":"AA==","connect.name":"org.apache.kafka.connect.data.Decimal","logicalType":"decimal"} [WARNING] Avro: Invalid default for field CASHDAY: 0 not a {"type":"bytes","scale":0,"precision":12,"connect.version":1,"connect.parameters":{"scale":"0","connect.decimal.precision":"12"},"connect.default":"AA==","connect.name":"org.apache.kafka.connect.data.Decimal","logicalType":"decimal"} [WARNING] Avro: Invalid default for field CASHMONTH: 0 not a {"type":"bytes","scale":0,"precision":12,"connect.version":1,"connect.parameters":{"scale":"0","connect.decimal.precision":"12"},"connect.default":"AA==","connect.name":"org.apache.kafka.connect.data.Decimal","logicalType":"decimal"} 40 40 0 0 1394 1394 0 0 1500 1500 0 0 10 10 0 0
6.2 as we ca see from above, there's warnings if we query data in hive, to elemiate the warnings
/avro-release-1.8.1/lang/java/avro/src/main/java/org/apache/avro/Schema.java
1 private static boolean isValidDefault(Schema schema, JsonNode defaultValue) { 2 if (defaultValue == null) 3 return false; 4 switch (schema.getType()) { 5 6 case BYTES: 7 if (schema.logicalType.getName().equals("decimal")|| 8 schema.logicalType.getName().toLowerCase().equals("bigdecimal")){ 9 return defaultValue.isBigDecimal(); 10 } 11 else{ 12 return defaultValue.isTextual(); 13 } 14 case STRING: 15 case ENUM: 16 case FIXED: 17 return defaultValue.isTextual(); 18 case INT: 19 case LONG: 20 case FLOAT: 21 case DOUBLE: 22 return defaultValue.isNumber(); 23 case BOOLEAN: 24 return defaultValue.isBoolean(); 25 case NULL: 26 return defaultValue.isNull(); 27 case ARRAY: 28 if (!defaultValue.isArray()) 29 return false; 30 for (JsonNode element : defaultValue) 31 if (!isValidDefault(schema.getElementType(), element)) 32 return false; 33 return true; 34 case MAP: 35 if (!defaultValue.isObject()) 36 return false; 37 for (JsonNode value : defaultValue) 38 if (!isValidDefault(schema.getValueType(), value)) 39 return false; 40 return true; 41 case UNION: // union default: first branch 42 return isValidDefault(schema.getTypes().get(0), defaultValue); 43 case RECORD: 44 if (!defaultValue.isObject()) 45 return false; 46 for (Field field : schema.getFields()) 47 if (!isValidDefault(field.schema(), 48 defaultValue.has(field.name()) 49 ? defaultValue.get(field.name()) 50 : field.defaultValue())) 51 return false; 52 return true; 53 default: 54 return false; 55 } 56 }
after the fix, replace the jar file in $HIVE_HOME and $CONFLUENT_KAFKA_HOME installation dir.
