Brad,
before the upgrade, test builds of gs-main on Linux with maxcpus=2 hung
on CoverageViewTest in 2/100 tests. CPU was still burning so it looked
like a livelock. I did not think to dump stack with jstack. I did not
see these hangs after the upgrade. It is possible that this upgrade will
fix the livelock(?) in GEOS-8491.
I also have another EPSG concurrency fix, but I thought that it would
only affect tests, where multiple ThreadedHsqlEpsgFactory are
instantiated, not production where there should be a single instance:
[GEOT-6056] EPSG lookup failures caused by concurrent database shutdown
in FactoryUsingHSQL finalizer
https://osgeo-org.atlassian.net/browse/GEOT-6056
https://github.com/geotools/geotools/pull/1953
It would be interesting to repeat the GEOS-8491 tests with both
GEOT-6050 and GEOT-6056 fixes applied.
Kind regards,
Ben.
On 30/06/18 16:25, br...@frogmouth.net wrote:
It is possible that
https://osgeo-org.atlassian.net/browse/GEOS-8491
is the same issue
Brad
-----Original Message-----
From: Ben Caradoc-Davies <b...@transient.nz>
Sent: Saturday, 30 June 2018 12:16 PM
To: GeoTools Devel <geotools-devel@lists.sourceforge.net>
Subject: [Geotools-devel] Backport of HSQLDB upgrade to 2.4.1
I will be backporting the upgrade of HSQLDB to 2.4.1
<https://osgeo-org.atlassian.net/browse/GEOT-6050> to 19.x and 18.x because
it is in effect a bug fix because it fixes concurrency problems that cause:
[GEOS-8802] CoverageViewTest intermittent failures
https://osgeo-org.atlassian.net/browse/GEOS-8802
To provide backwards and forwards compatibility (likely unneeded but we are
being super-careful), the upgrade changes the path to the EPSG database
file. This is unlikely to cause problems but I thought I should mention in
just in case.
Kind regards,
--
Ben Caradoc-Davies <b...@transient.nz>
Director
Transient Software Limited <https://transient.nz/> New Zealand
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New Zealand
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