io.confluent.ksql.exception.KafkaTopicExistsException: 当启动 ksql-server-start ksql-server.properties

Question

我使用 ksql 已经有一段时间了。 3 个节点的 Kafka 集群。我也一直在使用 udf，一切看起来都很好，直到我停止服务器并重新启动它们。在服务器启动时，我在日志中看到以下内容：

[2019-04-03 11:29:54,381] ERROR Exception encountered running command: A Kafka topic with the name 'czxcorp-structured-data-enriched' already exists, with different partition/replica configuration than required. KSQL expects 4 partitions (topic has 9), and 1 replication factor (topic has 1).. Retrying in 5000 ms (io.confluent.ksql.util.RetryUtil:80)
[2019-04-03 11:29:54,381] ERROR Stack trace: io.confluent.ksql.exception.KafkaTopicExistsException: A Kafka topic with the name 'czxcorp-structured-data-enriched' already exists, with different partition/replica configuration than required. KSQL expects 4 partitions (topic has 9), and 1 replication factor (topic has 1).
        at io.confluent.ksql.services.TopicValidationUtil.validateTopicProperties(TopicValidationUtil.java:51)
        at io.confluent.ksql.services.TopicValidationUtil.validateTopicProperties(TopicValidationUtil.java:35)
        at io.confluent.ksql.services.KafkaTopicClientImpl.validateTopicProperties(KafkaTopicClientImpl.java:292)
        at io.confluent.ksql.services.KafkaTopicClientImpl.createTopic(KafkaTopicClientImpl.java:76)
        at io.confluent.ksql.planner.plan.KsqlStructuredDataOutputNode.createSinkTopic(KsqlStructuredDataOutputNode.java:244)
        at io.confluent.ksql.planner.plan.KsqlStructuredDataOutputNode.buildStream(KsqlStructuredDataOutputNode.java:146)
        at io.confluent.ksql.physical.PhysicalPlanBuilder.buildPhysicalPlan(PhysicalPlanBuilder.java:106)
        at io.confluent.ksql.QueryEngine.buildPhysicalPlan(QueryEngine.java:113)
        at io.confluent.ksql.KsqlEngine$EngineExecutor.execute(KsqlEngine.java:625)
        at io.confluent.ksql.KsqlEngine$EngineExecutor.access0(KsqlEngine.java:577)
        at io.confluent.ksql.KsqlEngine.execute(KsqlEngine.java:247)
        at io.confluent.ksql.rest.server.computation.StatementExecutor.startQuery(StatementExecutor.java:277)
        at io.confluent.ksql.rest.server.computation.StatementExecutor.executeStatement(StatementExecutor.java:191)
        at io.confluent.ksql.rest.server.computation.StatementExecutor.handleStatementWithTerminatedQueries(StatementExecutor.java:167)
        at io.confluent.ksql.rest.server.computation.StatementExecutor.handleRestore(StatementExecutor.java:101)
        at io.confluent.ksql.rest.server.computation.CommandRunner.lambda$null[=12=](CommandRunner.java:139)
        at io.confluent.ksql.util.RetryUtil.retryWithBackoff(RetryUtil.java:63)
        at io.confluent.ksql.util.RetryUtil.retryWithBackoff(RetryUtil.java:36)
        at io.confluent.ksql.rest.server.computation.CommandRunner.lambda$processPriorCommands(CommandRunner.java:135)
        at java.util.ArrayList.forEach(ArrayList.java:1257)
        at io.confluent.ksql.rest.server.computation.CommandRunner.processPriorCommands(CommandRunner.java:134)
        at io.confluent.ksql.rest.server.KsqlRestApplication.buildApplication(KsqlRestApplication.java:414)
        at io.confluent.ksql.rest.server.KsqlServerMain.createExecutable(KsqlServerMain.java:80)
        at io.confluent.ksql.rest.server.KsqlServerMain.main(KsqlServerMain.java:42)
 (io.confluent.ksql.util.RetryUtil:84)

虽然我已经 stopped/terminated 所有的查询，但日志打印了我从一开始为测试直到数据执行的所有命令，包括 create, select, drop。我已经从 /ext 文件夹中取出 .jar(UDF) 并且服务器启动了，尽管日志打印 udf 函数（我正在使用）不可用。

这是我的ksql-server.properties:

bootstrap.servers=hostname:9092
service.id=cyan_ksql
commit.interval.ms=5000
cache.max.bytes.buffering=20000000
num.stream.threads=10
fail.on.deserialization.error=false
listeners=http://localhost:8088
ksql.extension.dir=/opt/ksql-master/ext/

为错误而疯狂。我正在删除该主题并以某种方式重新创建它。有人请帮忙。

Answer 1

检查错误：

A Kafka topic with the name 'czxcorp-structured-data-enriched' already exists, with different partition/replica configuration than required. 
KSQL expects 4 partitions (topic has 9), and 1 replication factor (topic has 1)

如果您删除了主题，那么

它实际上并没有被删除
它被删除了，其他东西用九个分区重新创建了它，你的错误 KSQL 查询没有指定覆盖（WITH (PARTITIONS=9）到默认的四个
另一个 KSQL 命令在出错的命令之前创建它，并且您的错误 KSQL 查询没有指定覆盖（WITH (PARTITIONS=9）到默认的四个

如果你想摆脱你的状态并从头开始，只需更改你的 ksql.service.id 这将导致 KSQL 使用新的命令主题（这是在你重新启动过程时重播的内容）

io.confluent.ksql.exception.KafkaTopicExistsException: 当启动 ksql-server-start ksql-server.properties

io.confluent.ksql.exception.KafkaTopicExistsException: when launching ksql-server-start ksql-server.properties

apache-kafka

kafka-topic

ksqldb