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From: Suny kk <suny.kk@gmail.com>
Date: Wed, 26 Jan 2011 01:39:50 +0400
Message-ID: <AANLkTik_S_nxLQpNMMybHu9oJhGwRcZkkrDOB6fhm8yw@mail.gmail.com>
Subject: Re: [DBCP] Too many connections issue...
To: Commons Users List <user@commons.apache.org>
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Hi Phil,

Yes, I'm using BasiDataSource well, Is it because of my DBCP settings?
Remember I got this exception when I started my application on different
machine with same database.


Regards

On Sun, Jan 23, 2011 at 8:48 PM, Phil Steitz <phil.steitz@gmail.com> wrote:

> On Sun, Jan 23, 2011 at 4:02 AM, Suny kk <suny.kk@gmail.com> wrote:
> > I'm using DBCP 1.2.2 version there's no commons pool dependency in my
> > project and following is stack trace
> >
> > org.springframework.jdbc.UncategorizedSQLException : (Hibernate
> operation):
> >> encountered SQLException [Cannot create PoolableConnectionFactory (Data
> >> source rejected establishment of connection, message from server: "Too
> many
> >> connections")]; nested exception is
> >> org.apache.commons.dbcp.SQLNestedException: Cannot create
> >> PoolableConnectionFactory (Data source rejected establishment of
> connection,
> >> message from server: "Too many connections")
> >>
>
> The server is rejecting DBCP's initial attempt at connecting.  The
> message, which is coming from the jdbc driver, appears to indicate
> that the server is out of connections when DBCP is trying to start.
> The stack trace indicates that this is happening on the first call to
> getConnection() (assuming you are using BasicDataSource).
>
> Phil
> >
> >
> > On Thu, Jan 20, 2011 at 4:02 PM, Phil Steitz <phil.steitz@gmail.com>
> wrote:
> >
> >> On Thu, Jan 20, 2011 at 6:16 AM, Suny kk <suny.kk@gmail.com> wrote:
> >> > Hi,
> >> >
> >> >
> >> > I've facing "Too many connections" issue and following are my DBCP
> >> > settings...
> >>
> >> What exactly is your problem - i.e., what exception / liveness issue
> >> are you seeing.  Also what versions of commons dbcp and commons pool
> >> are you running?
> >>
> >> Phil
> >> >
> >> > #####################################
> >> > # DBCP Connection Pool Settings
> >> > #####################################
> >> >
> >> > # The connection properties that will be sent to our JDBC driver when
> >> > # establishing new connections.
> >> > dbcp.connectionProperties=""
> >> >
> >> > # The default auto-commit state of connections created by this pool.
> >> > # [Default: true]
> >> > dbcp.defaultAutoCommit=true
> >> >
> >> > # The default read-only state of connections created by this pool. If
> not
> >> > set
> >> > # then the setReadOnly method will not be called.
> >> > #dbcp.defaultReadOnly=
> >> >
> >> > # The default catalog of connections created by this pool.
> >> > #dbcp.defaultCatalog=
> >> >
> >> > # The initial number of connections that are created when the pool is
> >> > started.
> >> > # [Default: 0]
> >> > dbcp.initialSize=10
> >> >
> >> > # The maximum number of active connections that can be allocated
> >> > # from this pool at the same time, or negative for no limit. [Default:
> 8]
> >> > dbcp.maxActive=500
> >> >
> >> > # The maximum number of connections that can remain idle in the pool,
> >> > # without extra ones being released, or negative for no limit.
> [Default:
> >> 8]
> >> > dbcp.maxIdle=8
> >> >
> >> > # The minimum number of connections that can remain idle in the pool,
> >> > without
> >> > # extra ones being created, or zero to create none. [Default: 0]
> >> > dbcp.minIdle=0
> >> >
> >> > # The maximum number of milliseconds that the pool will wait (when
> there
> >> are
> >> > # no available connections) for a connection to be returned before
> >> throwing
> >> > an
> >> > # exception, or -1 to wait indefinitely. [Default: -1]
> >> > dbcp.maxWait=30000
> >> >
> >> > # The SQL query that will be used to validate connections from this
> pool
> >> > before
> >> > # returning them to the caller. If specified, this query MUST be an
> SQL
> >> > SELECT
> >> > # statement that returns at least one row.
> >> > dbcp.validationQuery=SELECT 1
> >> >
> >> > # The indication of whether objects will be validated before being
> >> borrowed
> >> > # from the pool. If the object fails to validate, it will be dropped
> from
> >> > the
> >> > # pool, and we will attempt to borrow another. [Default: true]
> >> > #
> >> > # NOTE - for a true value to have any effect, the validationQuery
> >> parameter
> >> > #        must be set to a non-null string.
> >> > dbcp.testOnBorrow=true
> >> >
> >> > # The indication of whether objects will be validated before being
> >> returned
> >> > to
> >> > # the pool. [Default: false]
> >> > #
> >> > # NOTE - for a true value to have any effect, the validationQuery
> >> parameter
> >> > #        must be set to a non-null string.
> >> > dbcp.testOnReturn=false
> >> >
> >> > # The indication of whether objects will be validated by the idle
> object
> >> > # evictor (if any). If an object fails to validate, it will be dropped
> >> from
> >> > the
> >> > # pool. [Default: false]
> >> > #
> >> > # NOTE - for a true value to have any effect, the validationQuery
> >> parameter
> >> > #        must be set to a non-null string.
> >> > dbcp.testWhileIdle=false
> >> >
> >> > # The number of milliseconds to sleep between runs of the idle object
> >> > evictor
> >> > # thread. When non-positive, no idle object evictor thread will be
> run.
> >> > # [Default: -1]
> >> > dbcp.timeBetweenEvictionRunsMillis=-1
> >> >
> >> > # The number of objects to examine during each run of the idle object
> >> > evictor
> >> > # thread (if any). [Default: 3]
> >> > dbcp.numTestsPerEvictionRun=3
> >> >
> >> > # The minimum amount of time an object may sit idle in the pool before
> it
> >> is
> >> > # eligable for eviction by the idle object evictor (if any).
> >> > # [Default: 180000 (30 min)]
> >> > dbcp.minEvictableIdleTimeMillis=180000
> >> >
> >> > # A Collection of SQL statements that will be used to initialize
> physical
> >> > # connections when they are first created. These statements are
> executed
> >> > # only once - when the configured connection factory creates the
> >> connection.
> >> > # [Default: null]
> >> > #dbcp.connectionInitSqls=
> >> >
> >> > # Enable prepared statement pooling for this pool. [Default: false]
> >> > dbcp.poolPreparedStatements=true
> >> >
> >> > # The maximum number of open statements that can be allocated from the
> >> > # statement pool at the same time, or zero for no limit. [Default: 0]
> >> > dbcp.maxOpenPreparedStatements=25
> >> >
> >> > # Controls if the PoolGuard allows access to the underlying
> connection.
> >> > # [Default: false]
> >> > dbcp.accessToUnderlyingConnectionAllowed=false
> >> >
> >> > # Flag to remove abandoned connections if they exceed the
> >> > # removeAbandonedTimout. If set to true a connection is considered
> >> abandoned
> >> > # and eligible for removal if it has been idle longer than the
> >> > # removeAbandonedTimeout. Setting this to true can recover db
> connections
> >> > from
> >> > # poorly written applications which fail to close a connection.
> >> > # [Default: false]
> >> > dbcp.removeAbandoned=false
> >> >
> >> > # Timeout in seconds before an abandoned connection can be removed.
> >> > # [Default: 300]
> >> > dbcp.removeAbandonedTimeout=300
> >> >
> >> > # Flag to log stack traces for application code which abandoned a
> >> Statement
> >> > or
> >> > # Connection. Logging of abandoned Statements and Connections adds
> >> overhead
> >> > for
> >> > # every Connection open or new Statement because a stack trace has to
> be
> >> > # generated. [Default: false]
> >> > dbcp.logAbandoned=false
> >> >
> >>
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> >>
> >>
> >
>
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