【发布时间】：2020-01-23 12:37:10
【问题描述】：
当我使用 jOOQ 和 MariaDB 驱动程序执行查询以连接到 Aurora MySQL 数据库时，我的 Java 应用程序运行良好。在普通 SQL 中，我的查询如下所示，并注意时间戳：
select
A.id, B.x, B.y,
coalesce(A.modified, A.created) as modified
from
A join B on A.b_id = B.id
where
A.created between date_sub(now(), interval 1 day) and now()
or A.modified between date_sub(now(), interval 1 day) and now();
但是当我以更大的时间戳间隔运行相同的查询时，它立即失败并出现超时错误（AFAIK 没有实际的超时有机会发生），例如此查询将立即失败（再次注意时间戳）：
select
A.id, B.x, B.y,
coalesce(A.modified, A.created) as modified
from
A join B on A.b_id = B.id
where
A.created between date_sub(now(), interval 1 month) and now()
or A.modified between date_sub(now(), interval 1 month) and now();
直接通过 MySQL 控制台连接时，上述查询成功，并且我的系统中有一些其他长时间运行的查询使用成功运行的相同堆栈，没有超时投诉。问题仅发生在我的 Java 应用程序中，一些（但不是全部！）查询具有很大的时间间隔 - 例如一个月（但没有几天的间隔）。我的堆栈包括：
- 打开 JDK 8
- jOOQ 3.11
- MariaDB 连接器/J 2.2
- Aurora MySQL 5.6.10a
我的日志中的堆栈跟踪（附在下面）到处都显示“连接超时”和“读取超时”。任何想法为什么查询中的较长时间间隔会导致瞬时超时？如果需要，我会提供更多详细信息，请在 cmets 中询问。
更新：我将驱动程序更改为使用标准 MySQL Java 驱动程序，现在查询可以正常工作了！我将保留这个问题，因为我仍然想了解为什么会发生这种情况，MariaDB 驱动程序出了什么问题，以及是否有可能找到解决方法（因为我更愿意使用 MariaDB 驱动程序。）
org.jooq.exception.DataAccessException: SQL [<query>]; (conn=349133) Communications link failure with primary host <host>. Connection timed out
at org.jooq_3.11.4.MARIADB.debug(Unknown Source) ~[?:?]
at org.jooq.impl.Tools.translate(Tools.java:2384) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.DefaultExecuteContext.sqlException(DefaultExecuteContext.java:811) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:364) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.fetchLazy(AbstractResultQuery.java:393) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.fetchLazy(AbstractResultQuery.java:380) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.fetchStream(AbstractResultQuery.java:351) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.fetchStreamInto(AbstractResultQuery.java:356) ~[jooq-3.11.4.jar:?]
<redacted>
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_222]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_222]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_222]
Caused by: java.sql.SQLException: (conn=349133) Communications link failure with primary host <host>. Connection timed out
at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.get(ExceptionMapper.java:198) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.getException(ExceptionMapper.java:110) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbStatement.executeExceptionEpilogue(MariaDbStatement.java:228) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.executeInternal(MariaDbPreparedStatementClient.java:216) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.execute(MariaDbPreparedStatementClient.java:150) ~[Mariadb-java-client-2.2.x.jar:?]
at org.jooq.tools.jdbc.DefaultPreparedStatement.execute(DefaultPreparedStatement.java:209) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.Tools.executeStatementAndGetFirstResultSet(Tools.java:3483) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.execute(AbstractResultQuery.java:268) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:350) ~[jooq-3.11.4.jar:?]
... 17 more
Caused by: java.sql.SQLException: Communications link failure with primary host <host>. Connection timed out
on HostAddress{host='<host>', port=3306},master=true. Driver has reconnect connection
at org.mariadb.jdbc.internal.failover.AbstractMastersListener.throwFailoverMessage(AbstractMastersListener.java:517) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.handleFailOver(FailoverProxy.java:354) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.executeInvocation(FailoverProxy.java:292) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.invoke(FailoverProxy.java:263) ~[Mariadb-java-client-2.2.x.jar:?]
at com.sun.proxy.$Proxy48.executeQuery(Unknown Source) ~[?:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.executeInternal(MariaDbPreparedStatementClient.java:209) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.execute(MariaDbPreparedStatementClient.java:150) ~[Mariadb-java-client-2.2.x.jar:?]
at org.jooq.tools.jdbc.DefaultPreparedStatement.execute(DefaultPreparedStatement.java:209) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.Tools.executeStatementAndGetFirstResultSet(Tools.java:3483) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.execute(AbstractResultQuery.java:268) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:350) ~[jooq-3.11.4.jar:?]
... 17 more
Caused by: java.sql.SQLException: Read timed out
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.handleIoException(AbstractQueryProtocol.java:1786) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.readPacket(AbstractQueryProtocol.java:1344) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.getResult(AbstractQueryProtocol.java:1323) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:252) ~[Mariadb-java-client-2.2.x.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222]
at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.invoke(MastersSlavesListener.java:217) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.executeInvocation(FailoverProxy.java:270) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.invoke(FailoverProxy.java:263) ~[Mariadb-java-client-2.2.x.jar:?]
at com.sun.proxy.$Proxy48.executeQuery(Unknown Source) ~[?:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.executeInternal(MariaDbPreparedStatementClient.java:209) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.execute(MariaDbPreparedStatementClient.java:150) ~[Mariadb-java-client-2.2.x.jar:?]
at org.jooq.tools.jdbc.DefaultPreparedStatement.execute(DefaultPreparedStatement.java:209) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.Tools.executeStatementAndGetFirstResultSet(Tools.java:3483) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.execute(AbstractResultQuery.java:268) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:350) ~[jooq-3.11.4.jar:?]
... 17 more
Caused by: java.net.SocketTimeoutException: Read timed out
at java.net.SocketInputStream.socketRead0(Native Method) ~[?:1.8.0_222]
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116) ~[?:1.8.0_222]
at java.net.SocketInputStream.read(SocketInputStream.java:171) ~[?:1.8.0_222]
at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_222]
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246) ~[?:1.8.0_222]
at java.io.BufferedInputStream.read1(BufferedInputStream.java:286) ~[?:1.8.0_222]
at java.io.BufferedInputStream.read(BufferedInputStream.java:345) ~[?:1.8.0_222]
at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacketArray(StandardPacketInputStream.java:237) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.io.input.StandardPacketInputStream.getPacket(StandardPacketInputStream.java:207) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.readPacket(AbstractQueryProtocol.java:1342) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.getResult(AbstractQueryProtocol.java:1323) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.protocol.AbstractQueryProtocol.executeQuery(AbstractQueryProtocol.java:252) ~[Mariadb-java-client-2.2.x.jar:?]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_222]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_222]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_222]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_222]
at org.mariadb.jdbc.internal.failover.impl.MastersSlavesListener.invoke(MastersSlavesListener.java:217) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.executeInvocation(FailoverProxy.java:270) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.internal.failover.FailoverProxy.invoke(FailoverProxy.java:263) ~[Mariadb-java-client-2.2.x.jar:?]
at com.sun.proxy.$Proxy48.executeQuery(Unknown Source) ~[?:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.executeInternal(MariaDbPreparedStatementClient.java:209) ~[Mariadb-java-client-2.2.x.jar:?]
at org.mariadb.jdbc.MariaDbPreparedStatementClient.execute(MariaDbPreparedStatementClient.java:150) ~[Mariadb-java-client-2.2.x.jar:?]
at org.jooq.tools.jdbc.DefaultPreparedStatement.execute(DefaultPreparedStatement.java:209) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.Tools.executeStatementAndGetFirstResultSet(Tools.java:3483) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractResultQuery.execute(AbstractResultQuery.java:268) ~[jooq-3.11.4.jar:?]
at org.jooq.impl.AbstractQuery.execute(AbstractQuery.java:350) ~[jooq-3.11.4.jar:?]
... 17 more
【问题讨论】：
标签： java mysql mariadb jooq amazon-aurora