从副本读取时数据库连接失败答案

【问题标题】：Database connection failed when reading from copy从副本读取时数据库连接失败
【发布时间】：2020-06-15 19:29:49
【问题描述】：

我正在使用 kafka 源连接器从 RDS Aurora Postgres 捕获 CDC。收到此错误。如果有人知道这个问题，请提供帮助。

Caused by: org.postgresql.util.PSQLException: Database connection failed when reading from copy
    at org.postgresql.core.v3.QueryExecutorImpl.readFromCopy(QueryExecutorImpl.java:1074)
    at org.postgresql.core.v3.CopyDualImpl.readFromCopy(CopyDualImpl.java:37)
    at org.postgresql.core.v3.replication.V3PGReplicationStream.receiveNextData(V3PGReplicationStream.java:158)
    at org.postgresql.core.v3.replication.V3PGReplicationStream.readInternal(V3PGReplicationStream.java:123)
    at org.postgresql.core.v3.replication.V3PGReplicationStream.readPending(V3PGReplicationStream.java:80)
    at io.debezium.connector.postgresql.connection.PostgresReplicationConnection$1.readPending(PostgresReplicationConnection.java:397)
    at io.debezium.connector.postgresql.PostgresStreamingChangeEventSource.execute(PostgresStreamingChangeEventSource.java:119)
    at io.debezium.pipeline.ChangeEventSourceCoordinator.lambda$start$0(ChangeEventSourceCoordinator.java:99)
    ... 5 more 
Caused by: java.net.SocketException: Socket is closed
    at java.base/java.net.Socket.setSoTimeout(Socket.java:1155)
    at java.base/sun.security.ssl.BaseSSLSocketImpl.setSoTimeout(BaseSSLSocketImpl.java:639)
    at java.base/sun.security.ssl.SSLSocketImpl.setSoTimeout(SSLSocketImpl.java:73)
    at org.postgresql.core.PGStream.setNetworkTimeout(PGStream.java:589)
    at org.postgresql.core.PGStream.hasMessagePending(PGStream.java:139)
    at org.postgresql.core.v3.QueryExecutorImpl.processCopyResults(QueryExecutorImpl.java:1109)
    at org.postgresql.core.v3.QueryExecutorImpl.readFromCopy(QueryExecutorImpl.java:1072)
    ... 12 more

【问题讨论】：

您的网络连接似乎有问题
我有一个类似的问题，并且一直发生。与网络无关。

标签： postgresql apache-kafka-connect debezium

【解决方案1】：

Debezium 1.1.0.CR1 已经在这些情况下处理自动重新连接https://debezium.io/blog/2020/03/13/debezium-1-1-c1-released/

【讨论】：

【解决方案2】：

是的，Jiri Pechanec。实际上问题出在debezium版本上。如果连接因某些临时问题而丢失，旧版本不支持 Postgres 自动连接功能。现在新版本的 debezium (1.1.0) 支持自动连接功能。

【讨论】：