Ich versuche, meine C3P0-Einstellungen anzupassen, um den Fehler zu vermeiden, der am Ende dieses Beitrags angezeigt wird.Spielen! Framework 1.2.4 --- C3P0-Einstellungen zur Vermeidung von Kommunikationsverbindungsfehlern führen zu Leerlaufzeit
Es wurde bei dieser URL vorgeschlagen --- --- http://make-it-open.blogspot.com/2008/12/sql-error-0-sqlstate-08s01.html die Einstellungen anzupassen, wie folgt:
In hibernate.cfg.xml, schreiben
<property name="c3p0.min_size">5</property>
<property name="c3p0.max_size">20</property>
<property name="c3p0.timeout">1800</property>
<property name="c3p0.max_statements">50</property>
Then "c3p0.properties" erstellen in Ihrem Stamm Klassenpfad Ordner und schreiben
c3p0.testConnectionOnCheckout=true
c3p0.acquireRetryDelay=1000
c3p0.acquireRetryAttempts=1
Ich habe versucht, diese Anpassungen in die Richtung des Spiels! Framework-Dokumentation, wo sie Verwendung sagen „db.pool ...“ wie folgt:
db.pool.timeout=1800
db.pool.maxSize=15
db.pool.minSize=5
db.pool.initialSize=5
db.pool.acquireRetryAttempts=1
db.pool.preferredTestQuery=SELECT 1
db.pool.testConnectionOnCheckout=true
db.pool.acquireRetryDelay=1000
db.pool.maxStatements=50
Sind diese Einstellungen nicht zur Arbeit zu gehen? Soll ich versuchen, sie anders zu gestalten? Mit diesen Einstellungen bekomme ich immer noch den unten gezeigten Fehler, der auf eine lange Leerlaufzeit zurückzuführen ist.
komplette Stack-Trace Fehler:
23:00:44,932 WARN ~ SQL Error: 0, SQLState: 08S01
2012-04-13T23:00:44+00:00 app[web.1]: 23:00:44,932 ERROR ~ Communications link failure
2012-04-13T23:00:44+00:00 app[web.1]:
2012-04-13T23:00:44+00:00 app[web.1]: The last packet successfully received from the server was 274,847 milliseconds ago. The last packet sent successfully to the server was 7 milliseconds ago.
2012-04-13T23:00:44+00:00 app[web.1]: 23:00:44,934 ERROR ~ Why the driver complains here?
2012-04-13T23:00:44+00:00 app[web.1]: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: No operations allowed after connection closed.Connection was implicitly closed by the driver.
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.Util.handleNewInstance(Util.java:407)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.Util.getInstance(Util.java:382)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.throwConnectionClosedException(ConnectionImpl.java:1213)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.getMutex(ConnectionImpl.java:3101)
2012-04-13T23:00:44+00:00 app[web.1]: at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4975)
2012-04-13T23:00:44+00:00 app[web.1]: at org.hibernate.jdbc.BorrowedConnectionProxy.invoke(BorrowedConnectionProxy.java:74)
2012-04-13T23:00:44+00:00 app[web.1]: at $Proxy49.setAutoCommit(Unknown Source)
2012-04-13T23:00:44+00:00 app[web.1]: at play.db.jpa.JPAPlugin.closeTx(JPAPlugin.java:368)
2012-04-13T23:00:44+00:00 app[web.1]: at play.db.jpa.JPAPlugin.onInvocationException(JPAPlugin.java:328)
2012-04-13T23:00:44+00:00 app[web.1]: at play.plugins.PluginCollection.onInvocationException(PluginCollection.java:447)
2012-04-13T23:00:44+00:00 app[web.1]: at play.Invoker$Invocation.onException(Invoker.java:240)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job.onException(Job.java:124)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job.call(Job.java:163)
2012-04-13T23:00:44+00:00 app[web.1]: at play.jobs.Job$1.call(Job.java:66)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.FutureTask.run(FutureTask.java:166)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:165)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:266)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
2012-04-13T23:00:44+00:00 app[web.1]: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
2012-04-13T23:00:44+00:00 app[web.1]: at java.lang.Thread.run(Thread.java:636)
2012-04-13T23:00:44+00:00 app[web.1]: Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure