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Update notes for 2017-12-18

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Alan Orth 2017-12-18 17:03:58 +02:00
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45
content/post/2017-12.md
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@ -325,3 +325,48 @@ Elapsed time: 2 secs (2559 msecs)
- I need to keep an eye on this issue because it has nice fixes for reducing the number of database connections in DSpace 5.7: https://jira.duraspace.org/browse/DS-3551
- Update text on CGSpace about page to give some tips to developers about using the resources more wisely ([#352](https://github.com/ilri/DSpace/pull/352))
- Linode alerted that CGSpace was using 396.3% CPU from 12 to 2 PM
- The REST and OAI API logs look pretty much the same as earlier this morning, but there's a new IP harvesting XMLUI:
```
# cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep -E "18/Dec/2017" | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
360 95.108.181.88
477 66.249.66.90
526 86.101.203.216
691 207.46.13.13
698 197.210.168.174
819 207.46.13.146
878 68.180.229.254
1965 104.196.152.243
17701 2.86.72.181
52532 137.108.70.7
```
- 2.86.72.181 appears to be from Greece, and has the following user agent:
```
Mozilla/3.0 (compatible; Indy Library)
```
- Surprisingly it seems they are re-using their Tomcat session for all those 17,000 requests:
```
$ grep 2.86.72.181 dspace.log.2017-12-18 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
1
```
- I guess there's nothing I can do to them for now
- In other news, I am curious how many PostgreSQL connection pool errors we've had in the last month:
```
$ grep -c "Cannot get a connection, pool error Timeout waiting for idle object" dspace.log.2017-1* | grep -v :0
dspace.log.2017-11-07:15695
dspace.log.2017-11-08:135
dspace.log.2017-11-17:1298
dspace.log.2017-11-26:4160
dspace.log.2017-11-28:107
dspace.log.2017-11-29:3972
dspace.log.2017-12-01:1601
dspace.log.2017-12-02:1274
dspace.log.2017-12-07:2769
```

53
public/2017-12/index.html
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@ -23,7 +23,7 @@ The list of connections to XMLUI and REST API for today:
<meta property="article:published_time" content="2017-12-01T13:53:54&#43;03:00"/>
<meta property="article:modified_time" content="2017-12-18T14:02:24&#43;02:00"/>
<meta property="article:modified_time" content="2017-12-18T15:20:37&#43;02:00"/>
@ -56,9 +56,9 @@ The list of connections to XMLUI and REST API for today:
"@type": "BlogPosting",
"headline": "December, 2017",
"url": "https://alanorth.github.io/cgspace-notes/2017-12/",
"wordCount": "1787",
"wordCount": "1972",
"datePublished": "2017-12-01T13:53:54&#43;03:00",
"dateModified": "2017-12-18T14:02:24&#43;02:00",
"dateModified": "2017-12-18T15:20:37&#43;02:00",
"author": {
"@type": "Person",
"name": "Alan Orth"
@ -483,8 +483,55 @@ Elapsed time: 2 secs (2559 msecs)
<ul>
<li>I need to keep an eye on this issue because it has nice fixes for reducing the number of database connections in DSpace 5.7: <a href="https://jira.duraspace.org/browse/DS-3551">https://jira.duraspace.org/browse/DS-3551</a></li>
<li>Update text on CGSpace about page to give some tips to developers about using the resources more wisely (<a href="https://github.com/ilri/DSpace/pull/352">#352</a>)</li>
<li>Linode alerted that CGSpace was using 396.3% CPU from 12 to 2 PM</li>
<li>The REST and OAI API logs look pretty much the same as earlier this morning, but there&rsquo;s a new IP harvesting XMLUI:</li>
</ul>
<pre><code># cat /var/log/nginx/access.log /var/log/nginx/access.log.1 /var/log/nginx/library-access.log /var/log/nginx/library-access.log.1 | grep -E &quot;18/Dec/2017&quot; | awk '{print $1}' | sort -n | uniq -c | sort -h | tail
360 95.108.181.88
477 66.249.66.90
526 86.101.203.216
691 207.46.13.13
698 197.210.168.174
819 207.46.13.146
878 68.180.229.254
1965 104.196.152.243
17701 2.86.72.181
52532 137.108.70.7
</code></pre>
<ul>
<li>2.86.72.181 appears to be from Greece, and has the following user agent:</li>
</ul>
<pre><code>Mozilla/3.0 (compatible; Indy Library)
</code></pre>
<ul>
<li>Surprisingly it seems they are re-using their Tomcat session for all those 17,000 requests:</li>
</ul>
<pre><code>$ grep 2.86.72.181 dspace.log.2017-12-18 | grep -o -E 'session_id=[A-Z0-9]{32}' | sort -n | uniq | wc -l
1
</code></pre>
<ul>
<li>I guess there&rsquo;s nothing I can do to them for now</li>
<li>In other news, I am curious how many PostgreSQL connection pool errors we&rsquo;ve had in the last month:</li>
</ul>
<pre><code>$ grep -c &quot;Cannot get a connection, pool error Timeout waiting for idle object&quot; dspace.log.2017-1* | grep -v :0
dspace.log.2017-11-07:15695
dspace.log.2017-11-08:135
dspace.log.2017-11-17:1298
dspace.log.2017-11-26:4160
dspace.log.2017-11-28:107
dspace.log.2017-11-29:3972
dspace.log.2017-12-01:1601
dspace.log.2017-12-02:1274
dspace.log.2017-12-07:2769
</code></pre>

10
public/sitemap.xml
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@ -4,7 +4,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/2017-12/</loc>
<lastmod>2017-12-18T14:02:24+02:00</lastmod>
<lastmod>2017-12-18T15:20:37+02:00</lastmod>
</url>
<url>
@ -139,7 +139,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/</loc>
<lastmod>2017-12-18T14:02:24+02:00</lastmod>
<lastmod>2017-12-18T15:20:37+02:00</lastmod>
<priority>0</priority>
</url>
@ -150,7 +150,7 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/tags/notes/</loc>
<lastmod>2017-12-18T14:02:24+02:00</lastmod>
<lastmod>2017-12-18T15:20:37+02:00</lastmod>
<priority>0</priority>
</url>
@ -162,13 +162,13 @@
<url>
<loc>https://alanorth.github.io/cgspace-notes/post/</loc>
<lastmod>2017-12-18T14:02:24+02:00</lastmod>
<lastmod>2017-12-18T15:20:37+02:00</lastmod>
<priority>0</priority>
</url>
<url>
<loc>https://alanorth.github.io/cgspace-notes/tags/</loc>
<lastmod>2017-12-18T14:02:24+02:00</lastmod>
<lastmod>2017-12-18T15:20:37+02:00</lastmod>
<priority>0</priority>
</url>