The connection was reset

Can you please post the contents of comments.php so that, we can determine the exact problem.

because my guess is that when you are loading comments_template, it loads all the comments of the sites instead of per post vice.

Thanks Ritesh Sanap
Here:

<div class="blog-comment">
<?php
// Do not delete these lines
if (!empty($_SERVER['SCRIPT_FILENAME']) && 'comments.php' == basename($_SERVER['SCRIPT_FILENAME']))
    die ('Please do not load this page directly. Thanks!');

if ( post_password_required() ) { ?>
    <div class="alert alert-info"><?php _e("This post is password protected. Enter the password to view comments.",LANGUAGE); ?></div>
    <?php
    return;
}
?>

<!-- You can start editing here. -->

<?php if ( have_comments() ) : ?>

    <?php if ( ! empty($comments_by_type['comment']) ) : ?>
    <h2 class="title-right-blog"><?php comments_number(__("Comment",LANGUAGE) .' <span>' . __("(0)",LANGUAGE) . '</span> ', __("Comment",LANGUAGE) .' <span>' . __("(1)",LANGUAGE) . '</span> ', __("Comment",LANGUAGE) .' <span>(%)</span> ' );?></h2>

        <ul class="commentlist clear">
            <?php wp_list_comments('type=comment&callback=wp_comments'); ?>

    <?php endif; ?>

    <?php if ( ! empty($comments_by_type['pings']) ) : ?>
        <h6 id="pings">Trackbacks/Pingbacks</h6>

        <ul class="pinglist">
            <?php wp_list_comments('type=pings&callback=list_pings'); ?>

    <?php endif; ?>

    <nav id="comment-nav">
        <ul class="pagination">

<li><?php previous_comments_link( __("Older comments",LANGUAGE) ) ?></li>
<li><?php next_comments_link( __("Newer comments",LANGUAGE) ) ?></li>
    </nav>
<?php else : // this is displayed if there are no comments so far ?>

    <?php if ( comments_open() ) : ?>
        <!-- If comments are open, but there are no comments. -->

    <?php else : // comments are closed
        ?>

        <!-- If comments are closed. -->
        <p class="alert alert-info"><?php _e("Comments are closed",LANGUAGE); ?>.</p>

    <?php endif; ?>

<?php endif; ?>

<?php if ( comments_open() ) : ?>

    <?php
    $commenter = wp_get_current_commenter();
    $req = get_option( 'require_name_email' );
    $aria_req = ( $req ? " aria-required='true'" : '' );
    $defaults = array(
        'fields' => apply_filters( 'comment_form_default_fields', array(

                'author' =>'<div class="comment-form-author control-group col-sm-4"><input id="author" name="author" type="text" value="' . esc_attr( $commenter['comment_author'] ) .'" ' . $aria_req . ' placeholder="'.__( 'Name', LANGUAGE ).'" /></div>',

                'email' =>'<div class="comment-form-email control-group col-sm-4"><input id="email" name="email" type="text" value="' . esc_attr(  $commenter['comment_author_email'] ) .'" ' . $aria_req . ' placeholder="'.__( 'Email', LANGUAGE ).'" /></div>',

                'url' =>'<div class="comment-form-url control-group col-sm-4"><div class="controls"><input id="url" name="url" type="text" value="' . esc_attr( $commenter['comment_author_url'] ) .'" placeholder="'.__( 'Website', LANGUAGE ).'"/></div></div>'
            )
        ),
        'comment_field' =>  '<div class="clear"></div><div class="comment-form-comment control-group col-xs-12"><div class="controls"><textarea id="comment" name="comment" cols="45" rows="8" aria-required="true" placeholder="Your comment here.."></textarea></div></div>',
        'must_log_in' => '<div class="must-log-in control-group"><div class="controls">' .sprintf(__( 'You must be <a href="%s">logged in</a> to post a comment.' ),wp_login_url( apply_filters( 'the_permalink', get_permalink() ) )) . '</div></div >',
        'logged_in_as' => '<div class="logged-in-as control-group"><div class="controls">' .sprintf(__( 'Logged in as <a href="%1$s">%2$s</a>. <a href="%3$s" title="Log out of this account">Log out?</a>' ),admin_url( 'profile.php' ),$user_identity,wp_logout_url( apply_filters( 'the_permalink', get_permalink( ) ) )) . '</div></div>',

        'comment_notes_before' => '<div class="comment-notes control-group"><div class="controls">' .__( 'Your email address will not be published.' ) .'</div></div>',

        'comment_notes_after' => '<div class="form-allowed-tags control-group"><div class="controls">' .sprintf( __( 'You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes: %s' ),' <code>' . allowed_tags() . '</code>') . '</div></div>',

        'id_form'              => 'commentform',

        'id_submit'            => 'submit',

        'title_reply'          => __( 'Leave a Comment',LANGUAGE ),

        'title_reply_to'       => __( 'Leave a Reply %s',LANGUAGE ),

        'cancel_reply_link'    => __( 'Cancel reply',LANGUAGE ),

        'label_submit'         => __( 'Post Comment',LANGUAGE ),

    );?>

    <div class="row">
        <?php comment_form($defaults);?>
    </div>

<?php endif; // if you delete this the sky will fall on your head ?>

</div>