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我的 Play 应用程序在 Heroku 上使用 clearDB 运行良好一段时间。然后它因错误而崩溃

has exceeded the 'max_user_connections' resource

我按照这篇文章的说明进行操作

playframework 2.0 - 超过数据库演变的 max_user_connections？

然而，问题并没有解决。我什至尝试将此配置添加到 Procfile。

我可以通过 MySQL 工作台连接到我的数据库，所以当我的应用程序关闭时问题似乎不会持续存在。

尝试重新启动时我的日志输出如下。

State changed from crashed to starting
Starting process with command `target/universal/stage/bin/listbucket -Dhttp.port=${PORT} -Ddb.default.driver=com.mysql.jdbc.Driver -Ddb.default.url=${CLEARDB_DATABASE_URL} -Ddb.default.partitionCount=1 -Ddb.default.maxConnectionsPerPartition=5 -Ddb.default.minConnectionsPerPartition=5`
Picked up JAVA_TOOL_OPTIONS:  -Djava.rmi.server.useCodebaseOnly=true
Play server process ID is 2
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 10. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 9. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 8. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 7. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 6. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 5. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 4. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 3. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 2. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 1. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
    at play.api.Configuration$.play$api$Configuration$$configError(Configuration.scala:92)
    at play.api.Configuration.reportError(Configuration.scala:570)
Configuration error: Configuration error[Cannot connect to database [default]]
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    at scala.collection.immutable.List.foreach(List.scala:318)
Oops, cannot start the server.
    at scala.collection.immutable.List.foreach(List.scala:318)
    at play.api.Play$$anonfun$start$1.apply(Play.scala:88)
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18)
    at play.core.StaticApplication.<init>(ApplicationProvider.scala:52)
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:88)
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:243)
    at play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:88)
    at play.core.server.NettyServer$$anonfun$main$3.apply(NettyServer.scala:274)
    at play.core.server.NettyServer$$anonfun$main$3.apply(NettyServer.scala:279)
    at play.core.server.NettyServer$.main(NettyServer.scala:274)
    at play.core.server.NettyServer$.createServer(NettyServer.scala:243)
    at play.core.server.NettyServer.main(NettyServer.scala)
    at play.api.Play$$anonfun$start$1.apply$mcV$sp(Play.scala:88)
    at scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
    at scala.Option.map(Option.scala:145)
    at play.api.Play$$anonfun$start$1.apply(Play.scala:88)
    at play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:252)
    at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:244)
    at scala.collection.AbstractTraversable.map(Traversable.scala:105)
    at play.api.db.BoneCPPlugin.onStart(DB.scala:243)
    at play.api.Play$.start(Play.scala:87)
State changed from starting to crashed
Process exited with status 255
State changed from crashed to starting
Starting process with command `target/universal/stage/bin/listbucket -Dhttp.port=${PORT} -Ddb.default.driver=com.mysql.jdbc.Driver -Ddb.default.url=${CLEARDB_DATABASE_URL} -Ddb.default.partitionCount=1 -Ddb.default.maxConnectionsPerPartition=5 -Ddb.default.minConnectionsPerPartition=5`
Picked up JAVA_TOOL_OPTIONS:  -Djava.rmi.server.useCodebaseOnly=true
Play server process ID is 2
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and t
rying again. Attempts left: 10. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 9. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 8. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 7. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 6. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 5. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 4. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 3. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 2. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)
[error] c.j.b.h.AbstractConnectionHook - Failed to acquire connection to jdbc:mysql://us-cdbr-iron-east-01.cleardb.net/heroku_f176dd782ce596b?reconnect=true Sleeping for 1000ms and trying again. Attempts left: 1. Exception: null.Message:User 'b6cf16f10a7a77' has exceeded the 'max_user_connections' resource (current value: 10)

Heroku 几乎是一个接一个地头疼的大问题，所以任何帮助都将不胜感激，因为这几乎是我使用 Heroku 的最后一根稻草。

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1 回答 1

1

您需要在 *.conf 文件中编辑 db.default 的分区连接。

请参阅此处的文档。

你会对这三个感兴趣。

# In order to reduce lock contention and thus improve performance, 
# each incoming connection request picks off a connection from a 
# pool that has thread-affinity. 
# The higher this number, the better your performance will be for the 
# case when you have plenty of short-lived threads. 
# Beyond a certain threshold, maintenance of these pools will start 
# to have a negative effect on performance (and only for the case 
# when connections on a partition start running out).
db.default.partitionCount=2

# The number of connections to create per partition. Setting this to 
# 5 with 3 partitions means you will have 15 unique connections to the 
# database. Note that BoneCP will not create all these connections in 
# one go but rather start off with minConnectionsPerPartition and 
# gradually increase connections as required.
db.default.maxConnectionsPerPartition=5

# The number of initial connections, per partition.
db.default.minConnectionsPerPartition=5
于 2014-11-06T02:43:29.063 回答