<div style="line-height:1.7;color:#000000;font-size:14px;font-family:Arial"><p data-sourcepos="1:1-1:106" dir="auto">'servfail' exception occurs after BIND runs for a period of time, restart bind £ºservfail does not appear</p><p style="margin:0;">
</p><div>but£¬After running for some time, it still had the same 'servfail' problem</div><div><br></div><div><br></div><div><br></div><div><pre class="code highlight" lang="plaintext"><span id="LC1" class="line" lang="plaintext">#./sbin/named -V</span>
<span id="LC2" class="line" lang="plaintext">BIND 9.11.5 (Extended Support Version) <id:3b0b204></span>
<span id="LC3" class="line" lang="plaintext">running on Linux x86_64 3.10.0-514.26.2.el7.x86_64 #1 SMP Tue Jul 4 15:04:05 UTC 2017</span>
<span id="LC4" class="line" lang="plaintext">built by make with '--prefix=/home/bind/' '--enable-filter-aaaa' '--with-tuning=large' '--enable-largefile' '--enable-threads'</span>
<span id="LC5" class="line" lang="plaintext">compiled by GCC 4.8.5 20150623 (Red Hat 4.8.5-28)</span>
<span id="LC6" class="line" lang="plaintext">compiled with OpenSSL version: OpenSSL 1.0.2k  26 Jan 2017</span>
<span id="LC7" class="line" lang="plaintext">linked to OpenSSL version: OpenSSL 1.0.2k-fips  26 Jan 2017</span>
<span id="LC8" class="line" lang="plaintext">compiled with zlib version: 1.2.7</span>
<span id="LC9" class="line" lang="plaintext">linked to zlib version: 1.2.7</span>
<span id="LC10" class="line" lang="plaintext">threads support is enabled</span>
</pre><pre class="code highlight" lang="plaintext"><span class="line" lang="plaintext"><br></span></pre></div><div><br></div><div><img src="https://gitlab.isc.org/isc-projects/bind9/uploads/fa1a7f64305991d4577551a371323bd9/image.png" alt="image"></div><div><br></div><div><img src="https://gitlab.isc.org/isc-projects/bind9/uploads/511f0ca516686707c747e549d00b8304/image.png" alt="image"></div><div><br></div><div><br></div><div><br></div><div><img src="https://gitlab.isc.org/isc-projects/bind9/uploads/3a667fe825cd6da5b97f992ffe39b913/image.png" alt="image"></div></div>