Estoy teniendo un momento realmente difícil para solucionar este problema. Cada vez que trato de establecer una conexión con postgres, toma un minuto completo. Una vez establecida la conexión, todo está bien. Intenté deshabilitar todas las asignaciones y no cargar ninguna, pero la conexión tarda mucho tiempo en adquirirse. También intenté deshabilitar la validación, sin diferencia. Cuando uso una conexión JDBC sencilla y simple, es instantáneo. Hibernate está haciendo algo que lleva bastante tiempo y parece que no puedo reducirlo. ¡Cualquier aporte es muy apreciado!Hibernate Lento para adquirir la conexión de Postgres
Postgres conductor:
postgresql-9.1-901.jdbc4.jar
ajustes de configuración:
<hibernate-configuration>
<session-factory>
<!-- properties -->
<property name="dialect">org.hibernate.dialect.PostgreSQLDialect</property>
<property name="connection.driver_class">org.postgresql.Driver</property>
<property name="connection.url">jdbc:postgresql://xxxx.com:5432/xxxxx</property>
<property name="connection.username">xxxxxxx</property>
<property name="connection.password">xxxxxxx</property>
</session-factory>
</hibernate-configuration>
Ajustes adicionales en código:
config.setProperty("hibernate.hbm2ddl.auto", hbm2ddlMode);
//config.setProperty("hibernate.cache.use_query_cache", "true");
config.setProperty("hibernate.cache.use_second_level_cache", "true");
//config.setProperty("hibernate.cache.region.factory_class", "net.sf.ehcache.hibernate.EhCacheRegionFactory");
config.setProperty("hibernate.cache.provider_class", "org.hibernate.cache.EhCacheProvider");
//config.setProperty("hibernate.cache.provider_class", "org.hibernate.cache.NoCacheProvider");
config.setProperty("hibernate.jdbc.fetch_size", "100");
config.setProperty("hibernate.jdbc.batch_size", "30");
config.setProperty("hibernate.jdbc.use_scrollable_resultset", "true");
config.setProperty("hibernate.connection.provider_class", "org.hibernate.connection.C3P0ConnectionProvider");
config.setProperty("hibernate.c3p0.acquire_increment", "1");
config.setProperty("hibernate.c3p0.idle_test_period", "0");
config.setProperty("hibernate.c3p0.min_size", "1");
config.setProperty("hibernate.c3p0.max_size", "2");
config.setProperty("hibernate.c3p0.timeout", "0");
config.setProperty("javax.persistence.validation.mode", "none");
aquí está el segmento de código en el que el retraso se produce:
private SessionFactory buildSessionFactory() throws Exception {
ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(config.getProperties()).buildServiceRegistry();
//Building session takes a whole minute without mappings!!!
sessionFactory = config.buildSessionFactory(serviceRegistry);
validateConnection();
return sessionFactory;
}
He aquí los resultados de registro:
[main] 2012-04-09 10:40:32,823 110391 INFO C3P0ConnectionProvider - HHH000046:
Connection properties: {user=hgaidb_test, password=****}
[main] 2012-04-09 10:40:32,823 110391 INFO C3P0ConnectionProvider - HHH000006:
Autocommit mode: false
[main] 2012-04-09 10:40:34,100 111668 DEBUG JdbcServicesImpl - Database ->
name : PostgreSQL
version : 8.3.3
major : 8
minor : 3
[main] 2012-04-09 10:40:34,101 111669 DEBUG JdbcServicesImpl - Driver ->
name : PostgreSQL Native Driver
version : PostgreSQL 9.1 JDBC4 (build 901)
major : 9
minor : 1
*******************************************************************************
// 1 MINUTE DELAY
*******************************************************************************
[main] 2012-04-09 10:40:34,102 111670 DEBUG JdbcServicesImpl - JDBC version : 4.
0
[main] 2012-04-09 10:41:21,632 159200 INFO Dialect - HHH000400: Using dialect:
org.hibernate.dialect.PostgreSQLDialect
*******************************************************************************
[main] 2012-04-09 10:41:21,669 159237 INFO LobCreatorBuilder - HHH000424: Disab
ling contextual LOB creation as createClob() method threw error : java.lang.refl
ect.InvocationTargetException
[main] 2012-04-09 10:41:21,814 159382 DEBUG SettingsFactory - Automatic flush du
ring beforeCompletion(): disabled
[main] 2012-04-09 10:41:21,814 159382 DEBUG SettingsFactory - Automatic session
close at end of transaction: disabled
[main] 2012-04-09 10:41:21,815 159383 DEBUG SettingsFactory - JDBC batch size: 3
0
[main] 2012-04-09 10:41:21,816 159384 DEBUG SettingsFactory - JDBC batch updates
for versioned data: disabled
[main] 2012-04-09 10:41:21,816 159384 DEBUG SettingsFactory - Scrollable result
sets: enabled
[main] 2012-04-09 10:41:21,817 159385 DEBUG SettingsFactory - Wrap result sets:
disabled
[main] 2012-04-09 10:41:21,818 159386 DEBUG SettingsFactory - JDBC3 getGenerated
Keys(): enabled
[main] 2012-04-09 10:41:21,818 159386 DEBUG SettingsFactory - JDBC result set fe
tch size: 100
[main] 2012-04-09 10:41:21,819 159387 DEBUG SettingsFactory - Connection release
mode: auto
[main] 2012-04-09 10:41:21,819 159387 INFO TransactionFactoryInitiator - HHH000
399: Using default transaction strategy (direct JDBC transactions)
[main] 2012-04-09 10:41:21,844 159412 DEBUG SettingsFactory - Default batch fetc
h size: 1
[main] 2012-04-09 10:41:21,844 159412 DEBUG SettingsFactory - Generate SQL with
comments: disabled
[main] 2012-04-09 10:41:21,845 159413 DEBUG SettingsFactory - Order SQL updates
by primary key: disabled
[main] 2012-04-09 10:41:21,846 159414 DEBUG SettingsFactory - Order SQL inserts
for batching: disabled
[main] 2012-04-09 10:41:21,846 159414 DEBUG SettingsFactory - Query translator:
org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory
[main] 2012-04-09 10:41:21,867 159435 INFO ASTQueryTranslatorFactory - HHH00039
7: Using ASTQueryTranslatorFactory
[main] 2012-04-09 10:41:21,867 159435 DEBUG SettingsFactory - Query language sub
stitutions: {}
[main] 2012-04-09 10:41:21,867 159435 DEBUG SettingsFactory - JPA-QL strict comp
liance: disabled
[main] 2012-04-09 10:41:21,868 159436 DEBUG SettingsFactory - Second-level cache
: enabled
[main] 2012-04-09 10:41:21,868 159436 DEBUG SettingsFactory - Query cache: disab
led
[main] 2012-04-09 10:41:21,869 159437 DEBUG SettingsFactory - Cache region facto
ry : org.hibernate.cache.internal.NoCachingRegionFactory
[main] 2012-04-09 10:41:21,872 159440 DEBUG SettingsFactory - org.hibernate.cach
e.internal.NoCachingRegionFactory did not provide constructor accepting java.uti
l.Properties; attempting no-arg constructor.
[main] 2012-04-09 10:41:21,873 159441 DEBUG SettingsFactory - Optimize cache for
minimal puts: disabled
[main] 2012-04-09 10:41:21,873 159441 DEBUG SettingsFactory - Structured second-
level cache entries: disabled
[main] 2012-04-09 10:41:21,873 159441 DEBUG SettingsFactory - Statistics: disabl
ed
[main] 2012-04-09 10:41:21,874 159442 DEBUG SettingsFactory - Deleted entity syn
thetic identifier rollback: disabled
[main] 2012-04-09 10:41:21,874 159442 DEBUG SettingsFactory - Default entity-mod
e: pojo
[main] 2012-04-09 10:41:21,875 159443 DEBUG SettingsFactory - Named query checki
ng : enabled
[main] 2012-04-09 10:41:21,875 159443 DEBUG SettingsFactory - Check Nullability
in Core (should be disabled when Bean Validation is on): enabled
[main] 2012-04-09 10:41:21,876 159444 DEBUG SettingsFactory - multi-tenancy stra
tegy : NONE
que he hecho un poco más investigación sobre esto, paso a paso por el depurador. No tengo toda la fuente en mi classpath, pero todavía puedo ver las variables. Durring que uno minutos de espera, hibernación está consultando la tabla pg_catalog.pg_type:
[SELECT typname FROM pg_catalog.pg_type WHERE oid = , ]
Aquí hay una captura de pantalla:
Tal retraso puede deberse a problemas de DNS, intente utilizar la dirección IP en lugar del nombre de dominio en 'connection.url' para descartarlo. – axtavt
Lo intenté por IP, todavía no hay diferencia en los tiempos de adquisición. –
Vea también: http://stackoverflow.com/questions/23969399/persistence-createentitymanagerfactory-takes-very-long-time-to-return – Dojo