Óscar López :
My Java application works fine when I execute a query using jOOQ and the MariaDB driver for connecting to an Aurora MySQL database. In plain SQL my query looks like this, and notice the timestamps:
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();
But when I run the same query with a bigger timestamp interval, it fails immediately with a timeout error (AFAIK no actual timeout had a chance to happen), for example this query will fail at once (again, notice the timestamps):
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();
The above query succeeds when connecting directly through a MySQL console, and I have some other long-running queries in my system using the same stack that run successfully, with no timeout complaints. The problem only occurs from my Java application, with some (but not all!) queries that have a big time interval - say, a month (but no with an interval of a couple of days). My stack includes:
- Open JDK 8
- jOOQ 3.11
- MariaDB Connector/J 2.2
- Aurora MySQL 5.6.10a
The stack trace in my logs (attached below) shows "Connection timed out" and "Read timed out" all over the place. Any ideas why a longer interval in the query causes an instantaneous timeout? I'll provide more details if needed, just ask in the comments.
UPDATE: I changed my driver to use the standard MySQL Java driver, and the query now works! I'll leave this question open, because I'd still like to understand why this is happening, what's broken with the MariaDB driver, and if it's possible to find a workaround (because I'd prefer to use the MariaDB driver.)
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
Diego Dupin :
Aurora configuration has a default socket timeout of 10s: see socketTimeout documentation in https://mariadb.com/kb/en/library/about-mariadb-connector-j/:
Default: 0 (standard configuration) or 10000ms (using "aurora" failover configuration).
Changing that value to 0 means no timeout.
This can be done using connection string, like jdbc:mariadb:aurora://myHost/db?socketTimeout=0
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