Add notes for 2017-11-22

content/post/2017-11.md

@@ -756,3 +756,27 @@ $ grep -c com.atmire.utils.UpdateSolrStatsMetadata dspace.log.2017-11-19
 ```
 2017-11-21 11:11:09,621 WARN  org.dspace.authenticate.LDAPAuthentication @ anonymous:session_id=2FEC0E5286C17B6694567FFD77C3171C:ip_addr=77.241.141.58:ldap_authentication:type=failed_auth javax.naming.CommunicationException\colon; simple bind failed\colon; svcgroot2.cgiarad.org\colon;3269 [Root exception is javax.net.ssl.SSLHandshakeException\colon; sun.security.validator.ValidatorException\colon; PKIX path validation failed\colon; java.security.cert.CertPathValidatorException\colon; validity check failed]
 ```
+
+## 2017-11-22
+
+- Linode sent an alert that the CPU usage on the CGSpace server was very high around 4 to 6 AM
+- The logs don't show anything particularly abnormal between those hours:
+
+```
+# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep -E "22/Nov/2017:0[456]" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
+    136 31.6.77.23
+    174 68.180.229.254
+    217 66.249.66.91
+    256 157.55.39.79
+    268 54.144.57.183
+    281 207.46.13.137
+    282 207.46.13.36
+    290 207.46.13.23
+    696 66.249.66.90
+    707 104.196.152.243
+```
+
+- I haven't seen 54.144.57.183 before, it is apparently the CCBot from commoncrawl.org
+- In other news, it looks like the JVM garbage collection pattern is back to its standard jigsaw pattern after switching back to CMS a few days ago:
+
+![Tomcat JVM with CMS GC](/cgspace-notes/2017/11/tomcat-jvm-cms.png)

public/2017-11/index.html

@@ -38,7 +38,7 @@ COPY 54701
 
 <meta property="article:published_time" content="2017-11-02T09:37:54&#43;02:00"/>
 
-<meta property="article:modified_time" content="2017-11-20T15:56:01&#43;02:00"/>
+<meta property="article:modified_time" content="2017-11-21T20:23:00&#43;02:00"/>
 
 
 
@@ -86,9 +86,9 @@ COPY 54701
   "@type": "BlogPosting",
   "headline": "November, 2017",
   "url": "https://alanorth.github.io/cgspace-notes/2017-11/",
-  "wordCount": "4436",
+  "wordCount": "4549",
   "datePublished": "2017-11-02T09:37:54&#43;02:00",
-  "dateModified": "2017-11-20T15:56:01&#43;02:00",
+  "dateModified": "2017-11-21T20:23:00&#43;02:00",
   "author": {
     "@type": "Person",
     "name": "Alan Orth"
@@ -998,6 +998,33 @@ $ grep -c com.atmire.utils.UpdateSolrStatsMetadata dspace.log.2017-11-19
 <pre><code>2017-11-21 11:11:09,621 WARN  org.dspace.authenticate.LDAPAuthentication @ anonymous:session_id=2FEC0E5286C17B6694567FFD77C3171C:ip_addr=77.241.141.58:ldap_authentication:type=failed_auth javax.naming.CommunicationException\colon; simple bind failed\colon; svcgroot2.cgiarad.org\colon;3269 [Root exception is javax.net.ssl.SSLHandshakeException\colon; sun.security.validator.ValidatorException\colon; PKIX path validation failed\colon; java.security.cert.CertPathValidatorException\colon; validity check failed]
 </code></pre>
 
+<h2 id="2017-11-22">2017-11-22</h2>
+
+<ul>
+<li>Linode sent an alert that the CPU usage on the CGSpace server was very high around 4 to 6 AM</li>
+<li>The logs don&rsquo;t show anything particularly abnormal between those hours:</li>
+</ul>
+
+<pre><code># cat /var/log/nginx/access.log /var/log/nginx/access.log.1 | grep -E &quot;22/Nov/2017:0[456]&quot; | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
+    136 31.6.77.23
+    174 68.180.229.254
+    217 66.249.66.91
+    256 157.55.39.79
+    268 54.144.57.183
+    281 207.46.13.137
+    282 207.46.13.36
+    290 207.46.13.23
+    696 66.249.66.90
+    707 104.196.152.243
+</code></pre>
+
+<ul>
+<li>I haven&rsquo;t seen 54.144.57.183 before, it is apparently the CCBot from commoncrawl.org</li>
+<li>In other news, it looks like the JVM garbage collection pattern is back to its standard jigsaw pattern after switching back to CMS a few days ago:</li>
+</ul>
+
+<p><img src="/cgspace-notes/2017/11/tomcat-jvm-cms.png" alt="Tomcat JVM with CMS GC" /></p>
+
   
 
   

public/sitemap.xml

@@ -4,7 +4,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/2017-11/</loc>
-    <lastmod>2017-11-20T15:56:01+02:00</lastmod>
+    <lastmod>2017-11-21T20:23:00+02:00</lastmod>
   </url>
   
   <url>
@@ -134,7 +134,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/</loc>
-    <lastmod>2017-11-20T15:56:01+02:00</lastmod>
+    <lastmod>2017-11-21T20:23:00+02:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -145,7 +145,7 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
-    <lastmod>2017-11-20T15:56:01+02:00</lastmod>
+    <lastmod>2017-11-21T20:23:00+02:00</lastmod>
     <priority>0</priority>
   </url>
   
@@ -157,13 +157,13 @@
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/post/</loc>
-    <lastmod>2017-11-20T15:56:01+02:00</lastmod>
+    <lastmod>2017-11-21T20:23:00+02:00</lastmod>
     <priority>0</priority>
   </url>
   
   <url>
     <loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
-    <lastmod>2017-11-20T15:56:01+02:00</lastmod>
+    <lastmod>2017-11-21T20:23:00+02:00</lastmod>
     <priority>0</priority>
   </url>