DB error on initializing NodeRef with Service Registry

[abbask01]

I was trying to initialize a NodeRef on Bean initialization but got error for Authentication so i tried to run my code under Authentication.runAs(...) now i'm getting the below error on application restart.

My Code:

public void init() { // this has been refrenced as "init-method" in the service-context.xml
        doclibNode = AuthenticationUtil.runAs(new RunAsWork<NodeRef>() {

            @Override
            public NodeRef doWork() throws Exception {
                return getDocLibNode(); // also tried this without AuthenticationUtil.runAs(...)
            }

        }, AuthenticationUtil.getSystemUserName());

    }

    private NodeRef getDocLibNode() { // stores the document library node in a class variable
        LOG.info(siteId + ", " + containerId); // fetch these from properties
        return serviceRegistry.getSiteService().getContainer(siteId, containerId); // returns docLib Node
    }

Error:

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'myService' defined in class path resource [alfresco/module/${my-modul-name}/context/service-context.xml]: Invocation of init method failed; nested exception is org.springframework.jdbc.BadSqlGrammarException:
### Error querying database.  Cause: org.apache.commons.dbcp.SQLNestedException: Borrow prepareStatement from pool failed
### The error may exist in alfresco/ibatis/#resource.dialect#/node-common-SqlMap.xml
### The error may involve alfresco.node.select_StoreRootNodeByRef
### The error occurred while executing a query
### SQL: select             node.id             as id,             node.version        as version,             store.id            as store_id,             store.protocol      as protocol,             store.identifier    as identifier,             node.uuid           as uuid,             node.type_qname_id  as type_qname_id,             node.locale_id      as locale_id,             node.acl_id         as acl_id,             txn.id              as txn_id,             txn.change_txn_id   as txn_change_id,             node.audit_creator  as audit_creator,             node.audit_created  as audit_created,             node.audit_modifier as audit_modifier,             node.audit_modified as audit_modified,             node.audit_accessed  as audit_accessed               from             alf_store store             join alf_node node on (store.root_node_id = node.id)             join alf_transaction txn on (txn.id = node.transaction_id)         where             store.protocol = ? and             store.identifier = ?
### Cause: org.apache.commons.dbcp.SQLNestedException: Borrow prepareStatement from pool failed
; bad SQL grammar []; nested exception is org.apache.commons.dbcp.SQLNestedException: Borrow prepareStatement from pool failed

.......

I'm using SDK 3.0.1. full error is in attachment