https://githubfast.com/alibaba/canal/wiki/QuickStart
https://githubfast.com/alibaba/canal/wiki/Sync-ES

准备工作

• mysql版本 5.7
• es 版本 7.1.0 （这里用7.X版本都行没有小版本要求）
• canal-deployer 版本 1.1.7
• cannal-adapter 版本 1.1.5（我本来也是用1.1.7的谁知道最新版有问题）
• mysql表结构

CREATE TABLE `book` (
  `id` bigint NOT NULL AUTO_INCREMENT,
  `name` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
  `year` varchar(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_0900_ai_ci DEFAULT NULL,
  `last_updated` bigint DEFAULT NULL,
  `name2` varchar(255) DEFAULT NULL,
  `name3` varchar(255) DEFAULT NULL,
  `name4` varchar(255) DEFAULT NULL,
  `name5` varchar(255) DEFAULT NULL,
  `name6` tinyint DEFAULT NULL,
  `create_time` datetime DEFAULT NULL,
  `my_json` json DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE=InnoDB AUTO_INCREMENT=18 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci ROW_FORMAT=DYNAMIC

• 数据也给一份，到时候直接测试

INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (1, '1234', '1', 1695636893723, '1', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (2, '1', '1', 1695636893724, '1', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (3, '世界ol111', '1988', 1695636893734, '2', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (4, '三国演义41', '1987', 1695651267677, '1', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (5, '三国演义41', '1987', 1695651267677, '2', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (6, '三国演义41', '1987', 1695651267677, '4', NULL, NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (7, '三国演义41', '1987', 1695651267677, '4', '你好', NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (8, '三国演义411', '1987', 1695651267677, '4', '你好21', NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (9, '三国演义412', '1987', 1695651267677, '4', '你好2', NULL, NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (10, '三国演义41', '1987', 1695651267677, '4', '你好2', '你好3 ', NULL, NULL, NULL, NULL);
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (11, '三国演义411', '1987', 1695651267677, '4', '你好2', NULL, NULL, NULL, '2023-09-27 15:46:33', '{\"age\": 11, \"name\": \"yin1kai\"}');
INSERT INTO `db_example`.`book` (`id`, `name`, `year`, `last_updated`, `name2`, `name3`, `name4`, `name5`, `name6`, `create_time`, `my_json`) VALUES (16, '三国演义411', '1987', 1695651267677, '4', '你好2', '世界', '哈1', NULL, '2023-09-27 15:46:33', '{\"age\": 11, \"name\": \"yin1kai\"}');

开启mysql的binlog

[mysqld]
log-bin=mysql-bin # 开启 binlog
binlog-format=ROW # 选择 ROW 模式
server_id=1 # 配置 MySQL replaction 需要定义，不要和 canal 的 slaveId 重复

建立单独的mysql用户（也可以直接使用root）

-- 创建用户 用户名：canal 密码：Canal@123456 
create user 'canal'@'%' identified by 'Canal@123456';
-- 授权 *.*表示所有库 
grant SELECT, REPLICATION SLAVE, REPLICATION CLIENT on *.* to 'canal'@'%';
FLUSH PRIVILEGES;

deployer配置

canal.deployer-1.1.7-SNAPSHOT\conf\canal.properties

• canal.serverMode = tcp 表示deployer使用tcp协议直连adapter

#################################################
#########       common argument     #############
#################################################
# tcp bind ip
canal.ip =
# register ip to zookeeper
canal.register.ip =
canal.port = 11111
canal.metrics.pull.port = 11112
# canal instance user/passwd
# canal.user = canal
# canal.passwd = E3619321C1A937C46A0D8BD1DAC39F93B27D4458

# canal admin config
#canal.admin.manager = 127.0.0.1:8089
canal.admin.port = 11110
canal.admin.user = admin
canal.admin.passwd = 4ACFE3202A5FF5CF467898FC58AAB1D615029441
# admin auto register
#canal.admin.register.auto = true
#canal.admin.register.cluster =
#canal.admin.register.name =

canal.zkServers =
# flush data to zk
canal.zookeeper.flush.period = 1000
canal.withoutNetty = false
# tcp, kafka, rocketMQ, rabbitMQ, pulsarMQ
canal.serverMode = tcp
# flush meta cursor/parse position to file
canal.file.data.dir = ${canal.conf.dir}
canal.file.flush.period = 1000
## memory store RingBuffer size, should be Math.pow(2,n)
canal.instance.memory.buffer.size = 16384
## memory store RingBuffer used memory unit size , default 1kb
canal.instance.memory.buffer.memunit = 1024 
## meory store gets mode used MEMSIZE or ITEMSIZE
canal.instance.memory.batch.mode = MEMSIZE
canal.instance.memory.rawEntry = true

## detecing config
canal.instance.detecting.enable = false
#canal.instance.detecting.sql = insert into retl.xdual values(1,now()) on duplicate key update x=now()
canal.instance.detecting.sql = select 1
canal.instance.detecting.interval.time = 3
canal.instance.detecting.retry.threshold = 3
canal.instance.detecting.heartbeatHaEnable = false

# support maximum transaction size, more than the size of the transaction will be cut into multiple transactions delivery
canal.instance.transaction.size =  1024
# mysql fallback connected to new master should fallback times
canal.instance.fallbackIntervalInSeconds = 60

# network config
canal.instance.network.receiveBufferSize = 16384
canal.instance.network.sendBufferSize = 16384
canal.instance.network.soTimeout = 30

# binlog filter config
canal.instance.filter.druid.ddl = true
canal.instance.filter.query.dcl = false
canal.instance.filter.query.dml = false
canal.instance.filter.query.ddl = false
canal.instance.filter.table.error = false
canal.instance.filter.rows = false
canal.instance.filter.transaction.entry = false
canal.instance.filter.dml.insert = false
canal.instance.filter.dml.update = false
canal.instance.filter.dml.delete = false

# binlog format/image check
canal.instance.binlog.format = ROW,STATEMENT,MIXED 
canal.instance.binlog.image = FULL,MINIMAL,NOBLOB

# binlog ddl isolation
canal.instance.get.ddl.isolation = false

# parallel parser config
canal.instance.parser.parallel = true
## concurrent thread number, default 60% available processors, suggest not to exceed Runtime.getRuntime().availableProcessors()
#canal.instance.parser.parallelThreadSize = 16
## disruptor ringbuffer size, must be power of 2
canal.instance.parser.parallelBufferSize = 256

# table meta tsdb info
canal.instance.tsdb.enable = true
canal.instance.tsdb.dir = ${canal.file.data.dir:../conf}/${canal.instance.destination:}
canal.instance.tsdb.url = jdbc:h2:${canal.instance.tsdb.dir}/h2;CACHE_SIZE=1000;MODE=MYSQL;
canal.instance.tsdb.dbUsername = canal
canal.instance.tsdb.dbPassword = canal
# dump snapshot interval, default 24 hour
canal.instance.tsdb.snapshot.interval = 24
# purge snapshot expire , default 360 hour(15 days)
canal.instance.tsdb.snapshot.expire = 360

#################################################
#########       destinations        #############
#################################################
canal.destinations = example
# conf root dir
canal.conf.dir = ../conf
# auto scan instance dir add/remove and start/stop instance
canal.auto.scan = true
canal.auto.scan.interval = 5
# set this value to 'true' means that when binlog pos not found, skip to latest.
# WARN: pls keep 'false' in production env, or if you know what you want.
canal.auto.reset.latest.pos.mode = false

canal.instance.tsdb.spring.xml = classpath:spring/tsdb/h2-tsdb.xml
#canal.instance.tsdb.spring.xml = classpath:spring/tsdb/mysql-tsdb.xml

canal.instance.global.mode = spring
canal.instance.global.lazy = false
canal.instance.global.manager.address = ${canal.admin.manager}
#canal.instance.global.spring.xml = classpath:spring/memory-instance.xml
canal.instance.global.spring.xml = classpath:spring/file-instance.xml
#canal.instance.global.spring.xml = classpath:spring/default-instance.xml

##################################################
#########         MQ Properties      #############
##################################################
# aliyun ak/sk , support rds/mq
canal.aliyun.accessKey =
canal.aliyun.secretKey =
canal.aliyun.uid=

canal.mq.flatMessage = true
canal.mq.canalBatchSize = 50
canal.mq.canalGetTimeout = 100
# Set this value to "cloud", if you want open message trace feature in aliyun.
canal.mq.accessChannel = local

canal.mq.database.hash = true
canal.mq.send.thread.size = 30
canal.mq.build.thread.size = 8

##################################################
#########            Kafka           #############
##################################################
kafka.bootstrap.servers = 127.0.0.1:9092
kafka.acks = all
kafka.compression.type = none
kafka.batch.size = 16384
kafka.linger.ms = 1
kafka.max.request.size = 1048576
kafka.buffer.memory = 33554432
kafka.max.in.flight.requests.per.connection = 1
kafka.retries = 0

kafka.kerberos.enable = false
kafka.kerberos.krb5.file = ../conf/kerberos/krb5.conf
kafka.kerberos.jaas.file = ../conf/kerberos/jaas.conf

# sasl demo
# kafka.sasl.jaas.config = org.apache.kafka.common.security.scram.ScramLoginModule required \\n username=\"alice\" \\npassword="alice-secret\";
# kafka.sasl.mechanism = SCRAM-SHA-512
# kafka.security.protocol = SASL_PLAINTEXT

##################################################
#########           RocketMQ         #############
##################################################
rocketmq.producer.group = test
rocketmq.enable.message.trace = false
rocketmq.customized.trace.topic =
rocketmq.namespace =
rocketmq.namesrv.addr = 127.0.0.1:9876
rocketmq.retry.times.when.send.failed = 0
rocketmq.vip.channel.enabled = false
rocketmq.tag = 

##################################################
#########           RabbitMQ         #############
##################################################
rabbitmq.host =
rabbitmq.virtual.host =
rabbitmq.exchange =
rabbitmq.username =
rabbitmq.password =
rabbitmq.deliveryMode =


##################################################
#########             Pulsar         #############
##################################################
pulsarmq.serverUrl =
pulsarmq.roleToken =
pulsarmq.topicTenantPrefix =

conf\example\instance.properties

#################################################
## mysql serverId , v1.0.26+ will autoGen
## mysql serverId，这里的slaveId不能和myql集群中已有的server_id一样
canal.instance.mysql.slaveId=1234

# enable gtid use true/false
canal.instance.gtidon=false

# position info
canal.instance.master.address=127.0.0.1:3306
canal.instance.master.journal.name=
# mysql主库链接时起始的binlog偏移量
canal.instance.master.position=
# mysql主库链接时起始的binlog的时间戳
canal.instance.master.timestamp=
canal.instance.master.gtid=

# rds oss binlog
canal.instance.rds.accesskey=
canal.instance.rds.secretkey=
canal.instance.rds.instanceId=

# table meta tsdb info
canal.instance.tsdb.enable=true
#canal.instance.tsdb.url=jdbc:mysql://127.0.0.1:3306/canal_tsdb
#canal.instance.tsdb.dbUsername=canal
#canal.instance.tsdb.dbPassword=canal

#canal.instance.standby.address =
#canal.instance.standby.journal.name =
#canal.instance.standby.position =
#canal.instance.standby.timestamp =
#canal.instance.standby.gtid=

# username/password
canal.instance.dbUsername=canal
canal.instance.dbPassword=Canal@123456
canal.instance.connectionCharset = UTF-8
# enable druid Decrypt database password
canal.instance.enableDruid=false
#canal.instance.pwdPublicKey=MFwwDQYJKoZIhvcNAQEBBQADSwAwSAJBALK4BUxdDltRRE5/zXpVEVPUgunvscYFtEip3pmLlhrWpacX7y7GCMo2/JM6LeHmiiNdH1FWgGCpUfircSwlWKUCAwEAAQ==

# table regex
# table regex .*\..*表示监听所有表 也可以写具体的表名，用，隔开
canal.instance.filter.regex=.*\\..*
# table black regex
# mysql 数据解析表的黑名单，多个表用，隔开
canal.instance.filter.black.regex=
# table field filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.field=test1.t_product:id/subject/keywords,test2.t_company:id/name/contact/ch
# table field black filter(format: schema1.tableName1:field1/field2,schema2.tableName2:field1/field2)
#canal.instance.filter.black.field=test1.t_product:subject/product_image,test2.t_company:id/name/contact/ch

# mq config
canal.mq.topic=example
# dynamic topic route by schema or table regex
#canal.mq.dynamicTopic=mytest1.user,topic2:mytest2\\..*,.*\\..*
canal.mq.partition=0
# hash partition config
#canal.mq.enableDynamicQueuePartition=false
#canal.mq.partitionsNum=3
#canal.mq.dynamicTopicPartitionNum=test.*:4,mycanal:6
#canal.mq.partitionHash=test.table:id^name,.*\\..*
#
# multi stream for polardbx
canal.instance.multi.stream.on=false
#################################################

adapter 配置

adapter的application.yml

             
server:
  port: 8081
spring:
  jackson:
    date-format: yyyy-MM-dd HH:mm:ss
    time-zone: GMT+8
    default-property-inclusion: non_null

canal.conf:
  mode: tcp #tcp kafka rocketMQ rabbitMQ
  flatMessage: true
  zookeeperHosts:
  syncBatchSize: 1000
  retries: 0
  timeout:
  accessKey:
  secretKey:
  consumerProperties:
    # canal tcp consumer
    canal.tcp.server.host: 127.0.0.1:11111
    canal.tcp.zookeeper.hosts:
    canal.tcp.batch.size: 500
    canal.tcp.username:
    canal.tcp.password:
    # kafka consumer
    kafka.bootstrap.servers: 
    kafka.enable.auto.commit: false
    kafka.auto.commit.interval.ms: 
    kafka.auto.offset.reset: 
    kafka.request.timeout.ms: 
    kafka.session.timeout.ms: 
    kafka.isolation.level: 
    kafka.max.poll.records: 
    # rocketMQ consumer
    rocketmq.namespace:
    rocketmq.namesrv.addr: 
    rocketmq.batch.size: 
    rocketmq.enable.message.trace: 
    rocketmq.customized.trace.topic:
    rocketmq.access.channel:
    rocketmq.subscribe.filter:
    # rabbitMQ consumer
    rabbitmq.host:
    rabbitmq.virtual.host:
    rabbitmq.username:
    rabbitmq.password:
    rabbitmq.resource.ownerId:

  srcDataSources:
    defaultDS:
      url: jdbc:mysql://127.0.0.1:3306/db_example?useUnicode=true
      username: root
      password: 123456
  canalAdapters:
  - instance: example # canal instance Name or mq topic name
    groups:
    - groupId: g1
      outerAdapters:
      - name: logger
#      - name: rdb
#        key: mysql1
#        properties:
#          jdbc.driverClassName: com.mysql.jdbc.Driver
#          jdbc.url: jdbc:mysql://127.0.0.1:3306/mytest2?useUnicode=true
#          jdbc.username: root
#          jdbc.password: 121212
#      - name: rdb
#        key: oracle1
#        properties:
#          jdbc.driverClassName: oracle.jdbc.OracleDriver
#          jdbc.url: jdbc:oracle:thin:@localhost:49161:XE
#          jdbc.username: mytest
#          jdbc.password: m121212
#      - name: rdb
#        key: postgres1
#        properties:
#          jdbc.driverClassName: org.postgresql.Driver
#          jdbc.url: jdbc:postgresql://localhost:5432/postgres
#          jdbc.username: postgres
#          jdbc.password: 121212
#          threads: 1
#          commitSize: 3000
#      - name: hbase
#        properties:
#          hbase.zookeeper.quorum: 127.0.0.1
#          hbase.zookeeper.property.clientPort: 2181
#          zookeeper.znode.parent: /hbase
      - name: es7
        key: exampleKey
        hosts: http://127.0.0.1:9200 # 127.0.0.1:9200 for rest mode
        properties:
          mode: rest # or rest
          # security.auth: test:123456 #  only used for rest mode
          cluster.name: geektime
#        - name: kudu
#          key: kudu
#          properties:
#            kudu.master.address: 127.0.0.1 # ',' split multi address

具体同步表的配置

my.canal.adapter-1.1.5\conf\es7\book.yml

dataSourceKey: defaultDS        # 源数据源的key, 对应上面配置的srcDataSources中的值
outerAdapterKey: exampleKey     # 对应application.yml中es配置的key 
destination: example            # cannal的instance或者MQ的topic
groupId:                        # 对应MQ模式下的groupId, 只会同步对应groupId的数据
esMapping:
  _index: book           # es 的索引名称
  _type: _doc                   # es 的type名称, es7下无需配置此项
  _id: _id                      # es 的_id, 如果不配置该项必须配置下面的pk项_id则会由es自动分配
#  pk: id                       # 如果不需要_id, 则需要指定一个属性为主键属性
  # sql映射
  sql: "select a.id as _id, a.name, a.year, a.last_updated,a.name2,a.name3,a.name4,a.name5,a.name6,date_format(a.create_time,'%Y-%m-%d %H:%I:%S') as create_time,a.my_json from book a"
#  objFields:
#    _labels: array:;           # 数组或者对象属性, array:; 代表以;字段里面是以;分隔的
#    _obj: object               # json对象
  etlCondition: "where last_updated>='{0}'"     # etl 的条件参数
  commitBatch: 3000                         # 提交批大小

问题

1、Illegal character in scheme name at index 0: 127.0.0.1:9200
rest方式加http

2、Caused by: org.springframework.boot.context.properties.bind.BindException: Failed to bind properties under 'es-mapping' to com.alibaba.otter.canal.client.adapter.es.core.config.ESSyncConfig$ESMapping
原因：
但是从github上下载了最新的canal1.1.6，该版本并不能兼容java8，只能用低版本的canal1.1.5

3、ClassCastException: com.alibaba.druid.pool.DruidDataSource cannot be cast to com.alibaba.druid.pool.DruidDataSource** ）
原因：
druid版本冲突，解决思路：下载canal源码包，更改maven配置，本地打包后替换jar包即可

编辑后替换client-adapter.es7x-1.1.5-jar-with-dependencies.jar

4、又一个空指针
这个问题是app.yml的配置错误

2023-09-29 11:48:02.003 [main] ERROR c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## something goes wrong when starting up the canal client adapters:
java.lang.NullPointerException: null
        at com.alibaba.otter.canal.adapter.launcher.loader.AdapterProcessor.<init>(AdapterProcessor.java:69) ~[client-adapter.launcher-1.1.5.jar:na]
        at com.alibaba.otter.canal.adapter.launcher.loader.CanalAdapterLoader.lambda$init$0(CanalAdapterLoader.java:65) ~[client-adapter.launcher-1.1.5.jar:na]
        at java.util.HashMap.computeIfAbsent(HashMap.java:1128) ~[na:1.8.0_382]

5、又是一个错误。。
先启动canal.deployer 后启动canal.adapter就能解决

        ... 4 common frames omitted
2023-09-29 12:08:43.235 [Thread-4] INFO  c.a.otter.canal.adapter.launcher.loader.AdapterProcessor - =============> Start to connect destination: example <=============
2023-09-29 12:08:45.247 [Thread-4] ERROR c.a.otter.canal.adapter.launcher.loader.AdapterProcessor - process error!
com.alibaba.otter.canal.protocol.exception.CanalClientException: java.net.ConnectException: Connection refused: connect
        at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.doConnect(SimpleCanalConnector.java:198) ~[na:na]
        at com.alibaba.otter.canal.client.impl.SimpleCanalConnector.connect(SimpleCanalConnector.java:115) ~[na:na]
        at com.alibaba.otter.canal.connector.tcp.consumer.CanalTCPConsumer.connect(CanalTCPConsumer.java:63) ~[na:na]
        at com.alibaba.otter.canal.adapter.launcher.loader.AdapterProcessor.process(AdapterProcessor.java:184) ~[client-adapter.launcher-1.1.5.jar:na]
        at java.lang.Thread.run(Thread.java:750) ~[na:1.8.0_382]
Caused by: java.net.ConnectException: Connection refused: connect
        at sun.nio.ch.Net.connect0(Native Method) ~[na:1.8.0_382]
        at sun.nio.ch.Net.connect(Net.java:482) ~[na:1.8.0_382]
        at sun.nio.ch.Net.connect(Net.java:474) ~[na:1.8.0_382]

6、明显就是一个索引不存在就去操作数据的问题，是不是一定要手动创建es的index、mappings

java.lang.RuntimeException: [book] ElasticsearchStatusException[Elasticsearch exception [type=index_not_found_exception, reason=no such index [book]]]
        at com.alibaba.otter.canal.client.adapter.es.core.service.ESSyncService.sync(ESSyncService.java:116) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.service.ESSyncService.sync(ESSyncService.java:64) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.ESAdapter.sync(ESAdapter.java:115) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.ESAdapter.sync(ESAdapter.java:94) ~[na:na]
        at com.alibaba.otter.canal.adapter.launcher.loader.AdapterProcessor.batchSync(AdapterProcessor.java:139) ~[client-adapter.launcher-1.1.5.jar:na]
        at com.alibaba.otter.canal.adapter.launcher.loader.AdapterProcessor.lambda$null$1(AdapterProcessor.java:97) ~[client-adapter.launcher-1.1.5.jar:na]
        at java.util.concurrent.CopyOnWriteArrayList.forEach(CopyOnWriteArrayList.java:895) ~[na:1.8.0_382]
        at com.alibaba.otter.canal.adapter.launcher.loader.AdapterProcessor.lambda$null$2(AdapterProcessor.java:94) ~[client-adapter.launcher-1.1.5.jar:na]
        at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[na:1.8.0_382]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_382]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) ~[na:1.8.0_382]
        at java.lang.Thread.run(Thread.java:750) ~[na:1.8.0_382]
Caused by: org.elasticsearch.ElasticsearchStatusException: Elasticsearch exception [type=index_not_found_exception, reason=no such index [book]]
        at org.elasticsearch.rest.BytesRestResponse.errorFromXContent(BytesRestResponse.java:177) ~[na:na]
        at org.elasticsearch.client.RestHighLevelClient.parseEntity(RestHighLevelClient.java:1727) ~[na:na]
        at org.elasticsearch.client.RestHighLevelClient.parseResponseException(RestHighLevelClient.java:1704) ~[na:na]
        at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1467) ~[na:na]
        at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1439) ~[na:na]
        at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1406) ~[na:na]
        at org.elasticsearch.client.IndicesClient.getMapping(IndicesClient.java:266) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es7x.support.ESConnection.getMapping(ESConnection.java:132) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es7x.support.ES7xTemplate.getEsType(ES7xTemplate.java:393) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es7x.support.ES7xTemplate.getValFromData(ES7xTemplate.java:274) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es7x.support.ES7xTemplate.getESDataFromDmlData(ES7xTemplate.java:298) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.service.ESSyncService.singleTableSimpleFiledInsert(ESSyncService.java:439) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.service.ESSyncService.insert(ESSyncService.java:139) ~[na:na]
        at com.alibaba.otter.canal.client.adapter.es.core.service.ESSyncService.sync(ESSyncService.java:99) ~[na:na]
        ... 11 common frames omitted
        Suppressed: org.elasticsearch.client.ResponseException: method [GET], host [http://127.0.0.1:9200], URI [/book/_mapping?master_timeout=30s&ignore_throttled=false&ignore_unavailable=false&expand_wildcards=open&allow_no_indices=true], status line [HTTP/1.1 404 Not Found]
{"error":{"root_cause":[{"type":"index_not_found_exception","reason":"no such index [book]","index_uuid":"_na_","resource.type":"index_or_alias","resource.id":"book","index":"book"}],"type":"index_not_found_exception","reason":"no such index [book]","index_uuid":"_na_","resource.type":"index_or_alias","resource.id":"book","index":"book"},"status":404}
                at org.elasticsearch.client.RestClient.convertResponse(RestClient.java:253) ~[na:na]
                at org.elasticsearch.client.RestClient.performRequest(RestClient.java:231) ~[na:na]
                at org.elasticsearch.client.RestClient.performRequest(RestClient.java:205) ~[na:na]
                at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1454) ~[na:na]
                ... 21 common frames omitted
2023-09-29 12:52:32.488 [Thread-4] ERROR c.a.otter.canal.adapter.launcher.loader.AdapterProcessor - Outer adapter sync failed!  Error sync but AC

那就手动建立索引

PUT book
{
    "mappings": {
      "properties": {
        "create_time": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "id": {
          "type": "long"
        },
        "last_updated": {
          "type": "long"
        },
        "my_json": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name": {
          "type": "text"
        },
        "name2": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name3": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name4": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name5": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "name6": {
          "type": "text",
          "fields": {
            "keyword": {
              "type": "keyword",
              "ignore_above": 256
            }
          }
        },
        "year": {
          "type": "long"
        }
      }
    }
  }

注意事项

• adapter配置的ES7目录下yml中SQL语句，每个表必须要有别名，哪怕单表也是！！！不然修改就报错
• mysql改字段类型对于同步es没啥影响，主要是加字段要特殊处理

我的问题

1、不能同步建表语句到es的mappings。解决：手动put
2、添加mysql字段后不能把这个alter ddl直接同步到es里，还需要手动修改table_name.yml的sql语句加字段（虽然说不用重启canal服务会自动刷新配置但还是麻烦），尤其是在修改途中如果出现了数据表的新字段insert和update。那么这些差异数据怎么同步过去？确实有这种脏数据存在！！

解决方案：按一下步骤操作就可以避免这种问题。就是加mysql字段之前先停掉复制

• 停止canal adapter服务停止复制
• mysql加字段
• 改adapter的book.yml加字段
• 启动canal adapter启动复制

3、字段类型为tinyint
并且当我不配制status字段映射时，可以同步成功，但是status字段为null，是0被转成了false的问题，已修改源码解决。

4、新增为datetime类型的字段时adapter也不支持，报错：

java.lang.IllegalArgumentException: cannot write xcontent for unknown value of type class java.sql.Timestamp
java.lang.RuntimeException: java.lang.IllegalArgumentException: cannot write xcontent for unknown value of type class java.sql.Timestamp

解决：
在select的时候手动format时间字段，转成es可以接受的时间格式如date_format(trv.create_time,'%Y-%m-%d %H:%I:%S') ，当然这个格式要和es mapping中的时间字段的format要对齐，然后etl就没有问题了；方法二就是ES重建索引

5、如果期间同步错误，那么错误的那条就会丢失。修复后也找不到了。是不是引入mq就能解决？有待验证

正常同步insert的日志

properties:name=configurationPropertiesRebinder,context=484094a5,type=ConfigurationPropertiesRebinder]
2023-09-29 12:17:33.739 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## syncSwitch refreshed.
2023-09-29 12:17:33.740 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## start the canal client adapters.
2023-09-29 12:17:33.742 [main] INFO  c.a.otter.canal.client.adapter.support.ExtensionLoader - extension classpath dir: E:\workspace\canal\canal.adapter-1.1.5\plugin
2023-09-29 12:17:33.792 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Load canal adapter: logger succeed
2023-09-29 12:17:34.013 [main] INFO  c.a.o.c.client.adapter.es.core.config.ESSyncConfigLoader - ## Start loading es mapping config ...
2023-09-29 12:17:34.076 [main] INFO  c.a.o.c.client.adapter.es.core.config.ESSyncConfigLoader - ## ES mapping config loaded
2023-09-29 12:17:34.370 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Load canal adapter: es7 succeed
2023-09-29 12:17:34.378 [main] INFO  c.alibaba.otter.canal.connector.core.spi.ExtensionLoader - extension classpath dir: E:\workspace\canal\canal.adapter-1.1.5\plugin
2023-09-29 12:17:34.395 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterLoader - Start adapter for canal-client mq topic: example-g1 succeed
2023-09-29 12:17:34.395 [Thread-4] INFO  c.a.otter.canal.adapter.launcher.loader.AdapterProcessor - =============> Start to connect destination: example <=============
2023-09-29 12:17:34.395 [main] INFO  c.a.o.canal.adapter.launcher.loader.CanalAdapterService - ## the canal client adapters are running now ......
2023-09-29 12:17:34.404 [main] INFO  org.apache.coyote.http11.Http11NioProtocol - Starting ProtocolHandler ["http-nio-8081"]
2023-09-29 12:17:34.406 [main] INFO  org.apache.tomcat.util.net.NioSelectorPool - Using a shared selector for servlet write/read
2023-09-29 12:17:34.423 [main] INFO  o.s.boot.web.embedded.tomcat.TomcatWebServer - Tomcat started on port(s): 8081 (http) with context path ''
2023-09-29 12:17:34.427 [main] INFO  c.a.otter.canal.adapter.launcher.CanalAdapterApplication - Started CanalAdapterApplication in 5.239 seconds (JVM running for 5.788)
2023-09-29 12:17:34.464 [Thread-4] INFO  c.a.otter.canal.adapter.launcher.loader.AdapterProcessor - =============> Subscribe destination: example succeed <=============
2023-09-29 12:17:35.101 [pool-2-thread-1] INFO  c.a.o.canal.client.adapter.logger.LoggerAdapterExample - DML: {"data":[{"id":4,"name":"涓夊浗婕斾箟4","year":"1987","last_updated":1695651267677}],"database":"db_example","destination":"example","es":1695960855000,"groupId":"g1","isDdl":false,"old":null,"pkNames":["id"],"sql":"","table":"book","ts":1695961054998,"type":"INSERT"}