perfSONAR User Q&A and Other Discussion

[Pete Siemsen <>]

I have what may be the same problem. For me, it has a simple solution which I didn't stumble on for a while - just click anywhere on the page. The "Loading" disappears. Repeatable, odd, but easy to work around in my case.

-- Pete

On Mon, Nov 13, 2017 at 8:53 AM, Bryan Hess <> wrote:

Yes, I can reach that page-- loads with no problem. Restarting cassandra didn't fix it either, nor did a complete reboot.


esmond.log looks happy:

2017-11-13 10:44:40,092 [INFO] /usr/lib/esmond/esmond/cassandra.py: Connected to ['localhost:9160']
2017-11-13 10:46:35,336 [INFO] /usr/lib/esmond/esmond/cassandra.py: Checking/creating column families
2017-11-13 10:46:35,339 [INFO] /usr/lib/esmond/esmond/cassandra.py: Schema check done
2017-11-13 10:46:35,349 [INFO] /usr/lib/esmond/esmond/cassandra.py: Connected to ['localhost:9160']
2017-11-13 10:46:48,464 [INFO] /usr/lib/esmond/esmond/cassandra.py: Checking/creating column families
2017-11-13 10:46:48,467 [INFO] /usr/lib/esmond/esmond/cassandra.py: Schema check done
2017-11-13 10:46:48,478 [INFO] /usr/lib/esmond/esmond/cassandra.py: Connected to ['localhost:9160']

There was a complaint about cassandra in django.log, but it didn't repeat, so I think this was just during startup:

2017-11-13 10:43:08,481 [ERROR] /usr/lib/esmond/lib/python2.7/site-packages/django/core/handlers/base.py: Internal Server Error: /esmond/perfsonar/archive/
Traceback (most recent call last):
  File "/usr/lib/esmond/lib/python2.7/site-packages/django/core/handlers/base.py", line 119, in get_response
    resolver_match = resolver.resolve(request.path_info)
  File "/usr/lib/esmond/lib/python2.7/site-packages/django/core/urlresolvers.py", line 365, in resolve
    for pattern in self.url_patterns:
  File "/usr/lib/esmond/lib/python2.7/site-packages/django/core/urlresolvers.py", line 401, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "/usr/lib/esmond/lib/python2.7/site-packages/django/core/urlresolvers.py", line 395, in urlconf_module
    self._urlconf_module = import_module(self.urlconf_name)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/usr/lib/esmond/esmond/urls.py", line 27, in <module>
    from esmond.api.perfsonar.api_v2 import (
  File "/usr/lib/esmond/esmond/api/perfsonar/api_v2.py", line 65, in <module>
    raise ConnectionException(error_msg)
ConnectionException: 'Unable to connect to cassandra. Please verify cassandra is running.'



Cassandra seems to be running:

$ ps -ef | grep cassandra
cassand+  3309     1 18 10:43 ?        00:01:41 java -ea -javaagent:/usr/share/cassandra/lib/jamm-0.2.5.jar -XX:+CMSClassUnloadingEnabled -XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42 -Xms1955M -Xmx1955M -Xmn488M -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:StringTableSize=1000003 -XX:+UseParNewGC -XX:+UseConcMarkSweepGC -XX:+CMSParallelRemarkEnabled -XX:SurvivorRatio=8 -XX:MaxTenuringThreshold=1 -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+UseTLAB -XX:+CMSParallelInitialMarkEnabled -XX:+CMSEdenChunksRecordAlways -XX:+UseCondCardMark -Djava.net.preferIPv4Stack=true -Dcassandra.jmx.local.port=7199 -XX:+DisableExplicitGC -Dlog4j.configuration=log4j-server.properties -Dlog4j.defaultInitOverride=true -Dcassandra-pidfile=/var/run/cassandra/cassandra.pid -cp /etc/cassandra/conf:/usr/share/cassandra/lib/antlr-3.2.jar:/usr/share/cassandra/lib/apache-cassandra-2.0.17.jar:/usr/share/cassandra/lib/apache-cassandra-clientutil-2.0.17.jar:/usr/share/cassandra/lib/apache-cassandra-thrift-2.0.17.jar:/usr/share/cassandra/lib/commons-cli-1.1.jar:/usr/share/cassandra/lib/commons-codec-1.2.jar:/usr/share/cassandra/lib/commons-lang3-3.1.jar:/usr/share/cassandra/lib/compress-lzf-0.8.4.jar:/usr/share/cassandra/lib/concurrentlinkedhashmap-lru-1.3.jar:/usr/share/cassandra/lib/disruptor-3.0.1.jar:/usr/share/cassandra/lib/guava-15.0.jar:/usr/share/cassandra/lib/high-scale-lib-1.1.2.jar:/usr/share/cassandra/lib/jackson-core-asl-1.9.2.jar:/usr/share/cassandra/lib/jackson-mapper-asl-1.9.2.jar:/usr/share/cassandra/lib/jamm-0.2.5.jar:/usr/share/cassandra/lib/jbcrypt-0.3m.jar:/usr/share/cassandra/lib/jline-1.0.jar:/usr/share/cassandra/lib/json-simple-1.1.jar:/usr/share/cassandra/lib/libthrift-0.9.1.jar:/usr/share/cassandra/lib/log4j-1.2.16.jar:/usr/share/cassandra/lib/lz4-1.2.0.jar:/usr/share/cassandra/lib/metrics-core-2.2.0.jar:/usr/share/cassandra/lib/netty-3.6.6.Final.jar:/usr/share/cassandra/lib/reporter-config-2.1.0.jar:/usr/share/cassandra/lib/servlet-api-2.5-20081211.jar:/usr/share/cassandra/lib/slf4j-api-1.7.2.jar:/usr/share/cassandra/lib/slf4j-log4j12-1.7.2.jar:/usr/share/cassandra/lib/snakeyaml-1.11.jar:/usr/share/cassandra/lib/snappy-java-1.0.5.jar:/usr/share/cassandra/lib/snaptree-0.1.jar:/usr/share/cassandra/lib/stress.jar:/usr/share/cassandra/lib/super-csv-2.1.0.jar:/usr/share/cassandra/lib/thrift-server-0.3.7.jar org.apache.cassandra.service.CassandraDaemon
admin     9236  5002  0 10:52 pts/0    00:00:00 grep --color=auto cassandra

----- Original Message -----
From: "Andrew Lake" <>
To: "Trond Endrestøl" <>, "Bryan Hess" <>
Cc: "perfsonar-user" <>
Sent: Monday, November 13, 2017 10:15:21 AM
Subject: Re: [perfsonar-user] tests.cgi page stuck at loading

Hi,

Can you reach "https://<hostname>/esmond/perfsonar/archive/?limit=1”? You
may want to try restarting cassandra (systemctl restart cassandra). My
guess is that its hanging trying to connect to esmond. You can look for
errors in the logs under /var/log/esmond to verify.

Thanks,
Andy



On November 13, 2017 at 10:07:35 AM, Bryan Hess () wrote:


No, IPv4.


----- Original Message -----
From: "Trond Endrestøl" <>
To: "perfsonar-user" <>
Sent: Monday, November 13, 2017 10:02:08 AM
Subject: Re: [perfsonar-user] tests.cgi page stuck at loading

On Mon, 13 Nov 2017 09:26-0500, Bryan Hess wrote:

> Thanks for any pointers.

Are you accessing the web UI by an IPv6 connection?

--
Trond.