log.trace("Release session " + usage + " " + this);
        }

        if ( usage == 0 ) {
            if ( log.isDebugEnabled() ) {
                log.debug("Usage dropped to zero, release connection " + this.transport);
            }
            synchronized ( this ) {
                if ( this.transportAcquired.compareAndSet(true, false) ) {
                    this.transport.release();

re{content:"\f4ee"}.fa-creative-commons-sa:before{content:"\f4ef"}.fa-creative-commons-sampling:before{content:"\f4f0"}.fa-creative-commons-sampling-plus:before{content:"\f4f1"}.fa-creative-commons-share:before{content:"\f4f2"}.fa-creative-commons-zero:before{content:"\f4f3"}.fa-credit-card:before{content:"\f09d"}.fa-critical-role:before{content:"\f6c9"}.fa-crop:before{content:"\f125"}.fa-crop-alt:before{content:"\f565"}.fa-cross:before{content:"\f654"}.fa-crosshairs:before{content:"\f05b"}.fa-c...

re{content:"\f4ee"}.fa-creative-commons-sa:before{content:"\f4ef"}.fa-creative-commons-sampling:before{content:"\f4f0"}.fa-creative-commons-sampling-plus:before{content:"\f4f1"}.fa-creative-commons-share:before{content:"\f4f2"}.fa-creative-commons-zero:before{content:"\f4f3"}.fa-credit-card:before{content:"\f09d"}.fa-critical-role:before{content:"\f6c9"}.fa-crop:before{content:"\f125"}.fa-crop-alt:before{content:"\f565"}.fa-cross:before{content:"\f654"}.fa-crosshairs:before{content:"\f05b"}.fa-c...

                        && grantedCredits == 0 ) {
                    if ( this.credits.availablePermits() > 0 || n > 0 ) {
                        log.debug("Server " + this + " returned zero credits for " + curReq);
                    }
                    else {
                        log.warn("Server " + this + " took away all our credits");
                    }
                }