[英]Session Configuration/Timeout with Slick 3
有沒有一種方法可以在Slick 3中顯式處理會話? 我目前有一些看起來像的代碼
def findUserByEmail(email: String): Option[User] = {
val users = TableQuery[Users]
val action = users.filter(_.email === email).result.headOption
val result = db.run(action.transactionally)
Await.result(result, Duration.Inf)
}
在運行它的前幾次它運行良好,但是隨后我開始遇到一些問題,看起來連接/會話處於打開狀態(請參見下文)。 這段代碼在aws lambda函數內部運行,我想我需要更明確地處理會話。 我將如何在Slick 3中做到這一點?
"errorMessage": "Timeout after 5000ms of waiting for a connection.",
"errorType": "java.sql.SQLTimeoutException",
"stackTrace": [
"com.zaxxer.hikari.pool.BaseHikariPool.getConnection(BaseHikariPool.java:233)",
"com.zaxxer.hikari.pool.BaseHikariPool.getConnection(BaseHikariPool.java:183)",
"com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:93)",
"slick.jdbc.hikaricp.HikariCPJdbcDataSource.createConnection(HikariCPJdbcDataSource.scala:18)",
"slick.jdbc.JdbcBackend$BaseSession.<init>(JdbcBackend.scala:424)",
"slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:47)",
"slick.jdbc.JdbcBackend$DatabaseDef.createSession(JdbcBackend.scala:38)",
"slick.basic.BasicBackend$DatabaseDef.acquireSession(BasicBackend.scala:218)",
"slick.basic.BasicBackend$DatabaseDef.acquireSession$(BasicBackend.scala:217)",
"slick.jdbc.JdbcBackend$DatabaseDef.acquireSession(JdbcBackend.scala:38)",
"slick.basic.BasicBackend$DatabaseDef$$anon$2.run(BasicBackend.scala:239)",
"java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)",
"java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)",
"java.lang.Thread.run(Thread.java:745)"
],
"cause": {
"errorMessage": "FATAL: remaining connection slots are reserved for non-replication superuser connections",
"errorType": "org.postgresql.util.PSQLException",
"stackTrace": [
"org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2455)",
"org.postgresql.core.v3.QueryExecutorImpl.readStartupMessages(QueryExecutorImpl.java:2586)",
"org.postgresql.core.v3.QueryExecutorImpl.<init>(QueryExecutorImpl.java:113)",
"org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:222)",
"org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:52)",
"org.postgresql.jdbc.PgConnection.<init>(PgConnection.java:216)",
"org.postgresql.Driver.makeConnection(Driver.java:404)",
"org.postgresql.Driver.connect(Driver.java:272)",
您可以嘗試設置查詢超時。 像這樣:
db.run(action.transactionally.withStatementParameters(statementInit = st => st.setQueryTimeout(100)))
您還可以在Hikari連接池上設置不同的屬性,如下所示:
slick {
// https://github.com/slick/slick/blob/master/slick-hikaricp/src/main/scala/slick/jdbc/hikaricp/HikariCPJdbcDataSource.scala
dataSourceClass = "slick.jdbc.DriverDataSource"
user = ${database.user}
password = ${database.password}
url = ${database.url}
connectionPool = HikariCP
maxConnections = 50
numThreads = 10
queueSize = 5000
connectionInitSql = "SELECT 1;"
connectionTestQuery = "SELECT 1;"
registerMbeans = true
properties = {
driver = ${database.driver}
url = ${database.url}
}
}
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