I have been running DSpace 5.5 with Tomcat 7 and Postgresql 9 in production
for more than five years. A few weeks ago, the site started displaying
Internal Server Error. The errors were coming up quite often, every couple
of hours or so, and were going away after a tomcat restart. The logs were
showing "Cannot get a connection, pool error Timeout waiting for idle
object". I enabled the DEBUG level for logging, and every time before the
connection pool was exhausted, I noticed this in the logs:
2021-01-13 03:36:34,379 DEBUG org.dspace.google.GoogleRecorderEventListener
@ Usage event received bitstream:view
2021-01-13 03:36:34,380 DEBUG
org.apache.http.client.protocol.RequestAddCookies @ CookieSpec selected:
best-match
2021-01-13 03:36:34,380 DEBUG
org.apache.http.client.protocol.RequestAuthCache @ Auth cache not set in
the context
2021-01-13 03:36:34,380 DEBUG
*org.apache.http.impl.conn.PoolingHttpClientConnectionManager
@ **Connection request: [route:
{s}->https://www.google-analytics.com:443][total kept alive: 0; rout**e
allocated: 2 of 2; total allocated: 2 of 20]*
2021-01-13 03:36:41,422 ERROR org.dspace.storage.rdbms.DatabaseManager @
SQL connection Error -
2021-01-13 03:36:41,423 WARN org.dspace.app.webui.servlet.DSpaceServlet @
anonymous:no_context:database_error:org.apache.commons.dbcp.SQLNestedException\colon;
Cannot get a connection, pool error Timeout waiting for idle object
Any help would be much appreciated,
Gabriela
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