On 10/07/17 08:20, Sai Kumar wrote:
> Hi Users,
> 
> im getting the connection pool issue.
> 
> 
> *Unable to fetch a connection in xx seconds, none available[size:xxx;
> busy:xxx; idle:xx; lastwait:xxxx]. *

It would have been helpful if you had not replaced those values with xxx.

> *And Idle count is incresing more than the Maxidle connections.*
> 
> 
> 
> 
> *Here is the server.xml configured file,*
>>
>> <Resource name="@scc.datasource.name@" auth="Container"
>> factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
>>                         type="javax.sql.DataSource" maxActive="100"
>> minIdle="10" maxIdle="30"
>>                         maxWait="10000" username="@scc.datasource.username@"
>> password="@scc.datasource.password@"
>>                         driverClassName="@scc.datasource.driver@"
>> url="@scc.datasource.driverurl@" logAbandoned="true"
>>                         validationQuery="SELECT 1"
>>                           removeAbandoned="true"
>>                           testOnBorrow="true"
>>                           testWhileIdle="true"
>>                           timeBetweenEvictionRunsMillis="10000"
>>                           minEvictableIdleTimeMillis="180000"
>>                           removeAbandonedTimeout="60"
>>                     />
>>                     <Resource name="@scc.reports.datasource.name@"
>> auth="Container" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
>>                         type="javax.sql.DataSource" maxActive="100"
>> minIdle="10" maxIdle="30"
>>                         maxWait="10000"
>> username="@scc.reports.datasource.username@"
>> password="@scc.reports.datasource.password@"
>>                         driverClassName="@scc.reports.datasource.driver@"
>> url="@scc.reports.datasource.driverurl@" logAbandoned="true"
>>                         validationQuery="SELECT 1"
>>                           removeAbandoned="true"
>>                           testOnBorrow="true"
>>                           testWhileIdle="true"
>>                           timeBetweenEvictionRunsMillis="10000"
>>                           minEvictableIdleTimeMillis="180000"
>>                           removeAbandonedTimeout="60"
>>                       />
>>                     <Resource name="@scc.tickets.datasource.name@"
>> auth="Container" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
>>                         type="javax.sql.DataSource" maxActive="100"
>> minIdle="10"  maxIdle="30"
>>                         maxWait="10000"
>> username="@scc.tickets.datasource.username@"
>> password="@scc.tickets.datasource.password@"
>>                         driverClassName="@scc.tickets.datasource.driver@"
>> url="@scc.tickets.datasource.driverurl@"
>>                         validationQuery="SELECT 1"
>>                           removeAbandoned="true"
>>                           testOnBorrow="true"
>>                           testWhileIdle="true"
>>                           timeBetweenEvictionRunsMillis="10000"
>>                           minEvictableIdleTimeMillis="180000"
>>                           removeAbandonedTimeout="60"
>>                       />
>>                       <Resource name="@monitoring.datasource.name@"
>> auth="Container" factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
>>                         type="javax.sql.DataSource" maxActive="100"
>> minIdle="10" maxIdle="30"
>>                         maxWait="10000"
>> username="@monitoring.datasource.username@"
>> password="@monitoring.datasource.password@"
>>                         driverClassName="@monitoring.datasource.driver@"
>> url="@monitoring.datasource.driverurl@"
>>                         validationQuery="SELECT 1"
>>                           removeAbandoned="true"
>>                           testOnBorrow="true"
>>                           testWhileIdle="true"
>>                           timeBetweenEvictionRunsMillis="10000"
>>                           minEvictableIdleTimeMillis="180000"
>>                           removeAbandonedTimeout="60"
>>                       />
>>
> 
> 
> I checked my code,There is no problem with closing connections and all.
> 
> 
> I was tried with upgrading tomcat from 7.0.52 to minor versions of 7.0.x
> and Major version 8.0.x too.
> 
> Please tell me the solution permanent solution for this.

Absent a test case that demonstrates the problem it is pretty much
impossible for us to diagnose the problem based on the information
provided here.

Possible ways forward include:
- Take a series of 3 thread dumps 10s apart when the problem occurs.
  Analyse the thread dump for hints to what is going on.
- Configure the Tomcat for remote debugging, set a break point for
  connection borrow and step through the code using your favourite IDE
  when it stops working.
- Take a look at state of the pool(s) via JMX when the problem occurs.

The more relevant information you provide, the more likely we are to be
able to help.

Mark


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