PoolBase.java

private int getAndSetNetworkTimeout(Connection connection, long timeoutMs) {
    if (this.isNetworkTimeoutSupported != 0) {
        try {
            int originalTimeout = connection.getNetworkTimeout();
            connection.setNetworkTimeout(this.netTimeoutExecutor, (int)timeoutMs);
            this.isNetworkTimeoutSupported = 1;
            return originalTimeout;
        } catch (AbstractMethodError | Exception var5) {
            if (this.isNetworkTimeoutSupported == -1) {
                this.isNetworkTimeoutSupported = 0;
                this.logger.info("{} - Driver does not support get/set network timeout for connections. ({})", this.poolName, var5.getMessage());
                if (this.validationTimeout < TimeUnit.SECONDS.toMillis(1L)) {
                    this.logger.warn("{} - A validationTimeout of less than 1 second cannot be honored on drivers without setNetworkTimeout() support.", this.poolName);
                } else if (this.validationTimeout % TimeUnit.SECONDS.toMillis(1L) != 0L) {
                    this.logger.warn("{} - A validationTimeout with fractional second granularity cannot be honored on drivers without setNetworkTimeout() support.", this.poolName);
                }
            }
        }
    }

    return 0;