我们有一个 kubernetes 集群,其中 Debezium 作为来自 Postgresql 的源任务运行并写入 kafka。Debezium、postgres 和 kafka 都在不同的 pod 中运行。当 postgres pod 被删除并且 kubernetes 重新创建 pod 时,debezium pod 无法重新连接。来自 debezium pod 的日志:
2018-07-17 08:31:38,311 ERROR || WorkerSourceTask{id=inventory-connector-0} Task is being killed and will not recover until manually restarted [org.apache.kafka.connect.runtime.WorkerTask]
2018-07-17 08:31:38,311 INFO || [Producer clientId=producer-4] Closing the Kafka producer with timeoutMillis = 30000 ms. [org.apache.kafka.clients.producer.KafkaProducer]
Debezium 会继续尝试定期刷新未完成的消息,但会出现以下异常:
2018-07-17 08:32:38,167 ERROR || WorkerSourceTask{id=inventory-connector-0} Exception thrown while calling task.commit() [org.apache.kafka.connect.runtime.WorkerSourceTask]
org.apache.kafka.connect.errors.ConnectException: org.postgresql.util.PSQLException: Database connection failed when writing to copy
at io.debezium.connector.postgresql.RecordsStreamProducer.commit(RecordsStreamProducer.java:151)
at io.debezium.connector.postgresql.PostgresConnectorTask.commit(PostgresConnectorTask.java:138)
at org.apache.kafka.connect.runtime.WorkerSourceTask.commitSourceTask(WorkerSourceTask.java:437)
at org.apache.kafka.connect.runtime.WorkerSourceTask.commitOffsets(WorkerSourceTask.java:378)
at org.apache.kafka.connect.runtime.SourceTaskOffsetCommitter.commit(SourceTaskOffsetCommitter.java:108)
at org.apache.kafka.connect.runtime.SourceTaskOffsetCommitter.access$000(SourceTaskOffsetCommitter.java:45)
at org.apache.kafka.connect.runtime.SourceTaskOffsetCommitter$1.run(SourceTaskOffsetCommitter.java:82)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
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.postgresql.util.PSQLException: Database connection failed when writing to copy
at org.postgresql.core.v3.QueryExecutorImpl.flushCopy(QueryExecutorImpl.java:942)
at org.postgresql.core.v3.CopyDualImpl.flushCopy(CopyDualImpl.java:23)
at org.postgresql.core.v3.replication.V3PGReplicationStream.updateStatusInternal(V3PGReplicationStream.java:176)
at org.postgresql.core.v3.replication.V3PGReplicationStream.forceUpdateStatus(V3PGReplicationStream.java:99)
at io.debezium.connector.postgresql.connection.PostgresReplicationConnection$1.doFlushLsn(PostgresReplicationConnection.java:246)
at io.debezium.connector.postgresql.connection.PostgresReplicationConnection$1.flushLsn(PostgresReplicationConnection.java:239)
at io.debezium.connector.postgresql.RecordsStreamProducer.commit(RecordsStreamProducer.java:146)
... 13 more
Caused by: java.net.SocketException: Broken pipe (Write failed)
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111)
at java.net.SocketOutputStream.write(SocketOutputStream.java:155)
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
at org.postgresql.core.PGStream.flush(PGStream.java:553)
at org.postgresql.core.v3.QueryExecutorImpl.flushCopy(QueryExecutorImpl.java:939)
... 19 more
有没有办法让 debezium 在可用时重新建立与 postgres 的连接?还是我缺少一些配置?
- Debezium 版本 0.8
- Kubernetes 版本 1.10.3
- postgres 9.6 版