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I am at the early stages of investigating a maxing out of idle connections on a DSpace 6.3 with your newest R5 patch applied.
I attach below an anonymized snippet from a running production DSpace. In a two minute period, between 17:10:29 and 17:12:30 it attempted to send 50 hits to IRUS.
There were no "Successfully posted" entries which must mean that it received a non 200 response. (See here)
Is it possible that this series of non-successful posts to IRUS crowded out the database? It has double the default maxconnections, at 60 and maxidle set at 20 with maxwait at 5000 ms.
2020-11-23 17:10:29,498 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:29,787 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=B38A9EE996F551B961132D8EF4522177:ip_addr=***********:browse_mini:
2020-11-23 17:10:30,758 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=C6F809F8F2B4AA415CAF8B63C0B58FB8:ip_addr=***********:browse_by_item:
2020-11-23 17:10:30,773 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=C6F809F8F2B4AA415CAF8B63C0B58FB8:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@6f9ab643
2020-11-23 17:10:32,389 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=C6F809F8F2B4AA415CAF8B63C0B58FB8:ip_addr=***********:browse_by_item:
2020-11-23 17:10:32,584 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=C6F809F8F2B4AA415CAF8B63C0B58FB8:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@44e15a2d
2020-11-23 17:10:35,429 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:38,134 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:38,959 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=3CFB9AD8C49565B05BB5DA98AC5DB0D6:ip_addr=***********:browse_by_item:
2020-11-23 17:10:38,963 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=3CFB9AD8C49565B05BB5DA98AC5DB0D6:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@7582d0f1
2020-11-23 17:10:39,701 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:41,641 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:44,033 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=B41D17D0C9B6613610A09616D03BE853:ip_addr=***********:browse_by_item:
2020-11-23 17:10:44,037 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=B41D17D0C9B6613610A09616D03BE853:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@7df51e5a
2020-11-23 17:10:45,620 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:47,362 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ************
2020-11-23 17:10:47,362 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=3EF459A813C17E538E2BC9ECEEC59888:ip_addr=***********:view_bitstream:bitstream_id=*************
2020-11-23 17:10:48,426 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:51,868 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:10:52,149 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=A84B186410872F45E711BE6CAB2397DD:ip_addr=***********:browse_by_item:
2020-11-23 17:10:52,311 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=A84B186410872F45E711BE6CAB2397DD:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@109d5d28
2020-11-23 17:10:56,276 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ************
2020-11-23 17:10:56,276 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=B232EC6899DFC7C1DC0B1CEB82FC4B0A:ip_addr=***********:view_bitstream:bitstream_id=*************
2020-11-23 17:10:57,672 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ************
2020-11-23 17:10:57,672 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=8A313FC7E9BB65D316499CC745B6B6C9:ip_addr=***********:view_bitstream:bitstream_id=*****************
2020-11-23 17:10:59,019 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:00,358 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ************
2020-11-23 17:11:00,358 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=9EF44EDC77B0BFD0052A582EDC5FA501:ip_addr=***********:view_bitstream:bitstream_id=*************
2020-11-23 17:11:02,534 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=0441A39E13D63CCC78111799C3D3810F:ip_addr=***********:browse_by_item:
2020-11-23 17:11:02,539 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=0441A39E13D63CCC78111799C3D3810F:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@1053925f
2020-11-23 17:11:04,136 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:06,428 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed *************
2020-11-23 17:11:06,428 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=72633D26A1B1BA23C4C79A619990C4BD:ip_addr=***********:view_bitstream:bitstream_id=***********
2020-11-23 17:11:07,189 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=19C43C309CF9DA33F2ADDD949DEC8C84:ip_addr=***********:browse_by_item:
2020-11-23 17:11:07,193 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=19C43C309CF9DA33F2ADDD949DEC8C84:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@344417d
2020-11-23 17:11:09,197 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:09,839 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:10,196 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:10,490 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ***************
2020-11-23 17:11:10,490 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=30E93E321402BC2F111916E46799024C:ip_addr=***********:view_bitstream:bitstream_id=*******************
2020-11-23 17:11:11,842 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=265F7EB93A863FDFD24F46C00D59A326:ip_addr=***********:browse_by_item:
2020-11-23 17:11:11,953 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=265F7EB93A863FDFD24F46C00D59A326:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@7462a4bf
2020-11-23 17:11:14,322 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:15,728 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:17,065 INFO org.dspace.app.xmlui.aspect.discovery.AbstractSearch @ anonymous:session_id=4ED7B04573C10E5A8636EFBB55D2D5BA:ip_addr=***********:search:community_id=***************,query="null",results=(0,0,0)
2020-11-23 17:11:17,139 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ uri: ********/discover
2020-11-23 17:11:17,139 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ query: *
2020-11-23 17:11:17,139 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ scope: *******
2020-11-23 17:11:17,139 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ filters: author_keyword:*******************,dateIssued_keyword:2014,has_content_in_original_bundle_keyword:false
2020-11-23 17:11:19,903 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:20,063 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:20,406 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:22,025 INFO org.dspace.app.xmlui.aspect.artifactbrowser.CommunityBrowser @ anonymous:session_id=F9F284FD5D19A7E93E72CEEB5A518129:ip_addr=***********:view_community_list:
2020-11-23 17:11:25,789 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:26,939 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:27,809 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:29,005 INFO org.dspace.app.xmlui.aspect.discovery.AbstractSearch @ anonymous:session_id=133F8E7F7CD581AE36FE7E0427D6D326:ip_addr=***********:search:community_id=*********************,query="null",results=(0,0,0)
2020-11-23 17:11:29,063 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ uri: ***********/discover
2020-11-23 17:11:29,063 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ query: *
2020-11-23 17:11:29,063 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ scope: **********
2020-11-23 17:11:29,063 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ filters: author_keyword:***************,dateIssued_keyword:2014,has_content_in_original_bundle_keyword:false
2020-11-23 17:11:30,100 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:37,124 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:38,006 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:38,877 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:39,102 INFO org.dspace.app.xmlui.aspect.discovery.AbstractSearch @ anonymous:session_id=823450DAA3E4855EB23547A3AE4BC270:ip_addr=***********:search:community_id=**********d,query="null",results=(0,0,0)
2020-11-23 17:11:39,125 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ uri: **********/discover
2020-11-23 17:11:39,125 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ query: *
2020-11-23 17:11:39,125 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ scope: ***********
2020-11-23 17:11:39,125 INFO org.dspace.app.xmlui.aspect.discovery.CSVExportDiscoveryNavigation @ filters: author_keyword:************,dateIssued_keyword:2014,has_content_in_original_bundle_keyword:false
2020-11-23 17:11:42,778 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=EDD82D035097B29AF69DF1156A497FF7:ip_addr=***********:browse_by_item:
2020-11-23 17:11:42,782 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=EDD82D035097B29AF69DF1156A497FF7:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@302f5142
2020-11-23 17:11:46,832 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=2B2903DE7AAB8B0515C4534E7E9A112A:ip_addr=***********:browse_by_item:
2020-11-23 17:11:47,758 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:47,885 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=2B2903DE7AAB8B0515C4534E7E9A112A:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@370856d3
2020-11-23 17:11:47,916 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Attribute placeholder not found in element <input>
2020-11-23 17:11:47,916 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Translation not found for attribute title in element <input>
2020-11-23 17:11:48,325 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:48,821 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:49,041 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:50,269 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:54,567 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:54,710 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=25D1F9CC4E213BB9F4F177B60814F9CE:ip_addr=***********:browse_by_item:
2020-11-23 17:11:55,544 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=25D1F9CC4E213BB9F4F177B60814F9CE:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@21492dd
2020-11-23 17:11:55,598 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Attribute placeholder not found in element <input>
2020-11-23 17:11:55,598 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Translation not found for attribute title in element <input>
2020-11-23 17:11:55,913 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:57,836 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:58,541 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:11:59,135 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:00,490 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:01,930 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ****************
2020-11-23 17:12:01,931 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=E377C0D21F7E1A136C1657047CF4EE0A:ip_addr=***********:view_bitstream:bitstream_id=*************
2020-11-23 17:12:04,688 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=AC1A0B59A5C2A12EDD5B72AAFABD88C0:ip_addr=***********:browse_by_item:
2020-11-23 17:12:04,694 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:05,330 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=AC1A0B59A5C2A12EDD5B72AAFABD88C0:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@16fc6626
2020-11-23 17:12:05,404 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Attribute placeholder not found in element <input>
2020-11-23 17:12:05,404 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Translation not found for attribute title in element <input>
2020-11-23 17:12:06,030 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:12,111 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ********
2020-11-23 17:12:12,112 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=E7EE98365BA7163F9539EE04B5DCBD16:ip_addr=***********:view_bitstream:bitstream_id=********************
2020-11-23 17:12:13,394 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=8FC0AEC2FC7D9D29699670BD2D4C3E7A:ip_addr=***********:browse_by_item:
2020-11-23 17:12:13,977 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=8FC0AEC2FC7D9D29699670BD2D4C3E7A:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@6cb4bff0
2020-11-23 17:12:14,016 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Attribute placeholder not found in element <input>
2020-11-23 17:12:14,016 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Translation not found for attribute title in element <input>
2020-11-23 17:12:14,492 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:17,200 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:18,214 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:19,529 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:19,897 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:20,734 INFO org.dspace.browse.BrowseEngine @ anonymous:session_id=12657BE47AEE992B864FA1D2624CD553:ip_addr=***********:browse_by_item:
2020-11-23 17:12:21,197 INFO org.dspace.app.xmlui.aspect.artifactbrowser.ConfigurableBrowse @ anonymous:session_id=12657BE47AEE992B864FA1D2624CD553:ip_addr=***********:browse:org.dspace.app.xmlui.utils.DSpaceValidity@37bdfc4f
2020-11-23 17:12:21,252 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Attribute placeholder not found in element <input>
2020-11-23 17:12:21,252 WARN org.dspace.app.xmlui.cocoon.DSpaceI18NTransformer @ Translation not found for attribute title in element <input>
2020-11-23 17:12:22,220 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:23,440 INFO org.dspace.app.xmlui.aspect.artifactbrowser.CommunityBrowser @ anonymous:session_id=512DE8BD0D7D0DB1FD85498237D4D1B3:ip_addr=***********:view_community_list:
2020-11-23 17:12:23,857 INFO com.atmire.statistics.export.ExportUsageEventListener @ Robot (Mozilla/5.0 (compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm)) accessed ***********
2020-11-23 17:12:23,858 INFO org.dspace.usage.LoggerUsageEventListener @ anonymous:session_id=554212F348CBC2A0A13EE74DA3D90E4E:ip_addr=***********:view_bitstream:bitstream_id=************
2020-11-23 17:12:24,626 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:27,465 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:28,418 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:29,693 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:29,701 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:30,093 DEBUG com.atmire.statistics.export.ExportUsageEventListener @ Prepared to send url to tracker URL: https://irus.jisc.ac.uk/counter/
2020-11-23 17:12:37,432 WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ SQL Error: 0, SQLState: null
2020-11-23 17:12:37,432 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ Cannot get a connection, pool error Timeout waiting for idle object
2020-11-23 17:12:38,872 WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ SQL Error: 0, SQLState: null
2020-11-23 17:12:38,872 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ Cannot get a connection, pool error Timeout waiting for idle object
2020-11-23 17:12:38,929 WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ SQL Error: 0, SQLState: null
2020-11-23 17:12:38,929 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ Cannot get a connection, pool error Timeout waiting for idle object
2020-11-23 17:12:40,894 WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ SQL Error: 0, SQLState: null
2020-11-23 17:12:40,894 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ Cannot get a connection, pool error Timeout waiting for idle object
2020-11-23 17:12:42,446 WARN org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ SQL Error: 0, SQLState: null
2020-11-23 17:12:42,446 ERROR org.hibernate.engine.jdbc.spi.SqlExceptionHelper @ Cannot get a connection, pool error Timeout waiting for idle object
2020-11-23 17:12:42,461 ERROR org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter @ Serious Error Occurred Processing Request!
javax.servlet.ServletException: org.apache.cocoon.ProcessingException: Sitemap: error invoking action
at <map:act type="locale"> - file:///dspace/webapps/xmlui/sitemap.xmap:773:64
at org.apache.cocoon.servlet.RequestProcessor.service(RequestProcessor.java:230)
at org.apache.cocoon.sitemap.SitemapServlet.service(SitemapServlet.java:84)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:468)
at org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:443)
at org.apache.cocoon.servletservice.spring.ServletFactoryBean$ServiceInterceptor.invoke(ServletFactoryBean.java:264)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy203.service(Unknown Source)
at org.dspace.springmvc.CocoonView.render(CocoonView.java:113)
at org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1216)
at org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1001)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:867)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:951)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:842)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:827)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.dspace.app.xmlui.cocoon.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:113)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.dspace.app.xmlui.cocoon.DSpaceCocoonServletFilter.doFilter(DSpaceCocoonServletFilter.java:160)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.dspace.app.xmlui.cocoon.servlet.multipart.DSpaceMultipartFilter.doFilter(DSpaceMultipartFilter.java:119)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.dspace.rdf.negotiation.NegotiationFilter.doFilter(NegotiationFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:78)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.ajp.AjpProcessor.service(AjpProcessor.java:394)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:770)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
The text was updated successfully, but these errors were encountered:
I am at the early stages of investigating a maxing out of idle connections on a DSpace 6.3 with your newest R5 patch applied.
I attach below an anonymized snippet from a running production DSpace. In a two minute period, between 17:10:29 and 17:12:30 it attempted to send 50 hits to IRUS.
There were no "Successfully posted" entries which must mean that it received a non 200 response. (See here)
Is it possible that this series of non-successful posts to IRUS crowded out the database? It has double the default maxconnections, at 60 and maxidle set at 20 with maxwait at 5000 ms.
The text was updated successfully, but these errors were encountered: