Hi Anil,
From server logs we see that have some threads stucked and continuosly get on
server2 the following message(bucket missing on server2 for DfSessions region):
[warn 2020/09/15 14:25:39.852 CEST <PartitionedRegion Message Processor2>
tid=0x251] 15 secs have elapsed waiting for a primary for bucket [BucketAdvisor
/__PR/_B__DfSessions_18:935: state=VOLUNTEERING_HOSTING]. Current bucket owners
[]
And on the other server1:
[warn 2020/09/15 14:25:40.852 CEST <ResourceManagerRecoveryThread 1> tid=0xdf]
15 seconds have elapsed while waiting for replies:
<FetchPartitionDetailsMessage$FetchPartitionDetailsResponse 3808 waiting for 1
replies from [192.168.0.145(server2:28054)<v6>:41003]> on
192.168.0.145(server1:28031)<v5>:41002 whose current membership list is:
[[192.168.0.145(locator1:27244:locator)<ec><v0>:41000,
192.168.0.145(locator2:27343:locator)<ec><v1>:41001,
192.168.0.145(server1:28031)<v5>:41002, 192.168.0.145(server2:28054)<v6>:41003]]
[warn 2020/09/15 14:27:20.200 CEST <ThreadsMonitor> tid=0x11] Thread 223 (0xdf)
is stuck
[warn 2020/09/15 14:27:20.202 CEST <ThreadsMonitor> tid=0x11] Thread <223>
(0xdf) that was executed at <15 Sep 2020 14:25:24 CEST> has been stuck for
<115.361 seconds> and number of thread monitor iteration <1>
Thread Name <ResourceManagerRecoveryThread 1> state <TIMED_WAITING>
...
It seems that this is not problem with stats.
We have a some suspicion that the problem is with some lock, but we need to
investigate it a bit more.
BR,
Mario
________________________________
Šalje: Anilkumar Gingade <aging...@vmware.com>
Poslano: 15. rujna 2020. 16:36
Prima: dev@geode.apache.org <dev@geode.apache.org>
Predmet: Re: Colocated regions missing some buckets after restart
Mario,
I doubt this has anything to do with the client connections. If it is it should
be between server/member to server/member connection; in that case the
unresponsive member is kicked out from the cluster.
The recommended configuration is to have persistence regions for both parent
and co-located regions (and replicated regions)...
There could be issues in the stats too...Can you try executing a
test/validation code on server side to dump/list primary and secondary buckets.
You can do that using helper methods:
pr.getDataStore().getAllLocalPrimaryBucketIds();
-Anil
On 9/14/20, 12:25 AM, "Mario Kevo" <mario.k...@est.tech> wrote:
Hi,
This problem is usually seen only on 1 server. The other servers metrics
and bucket count looks fine. Another symptom of this issue is that the
max-connections limit is reached on the problematic server if we have a client
that tries to reconnect after the server restart. Clients simply get no
response from the server so they try to close the connection, but the
connection close is not acknowledged by the server. On server side we see that
the connections are in CLOSE-WAIT state with packets in the socket receiver
queue. It’s as if the servers just stopped processing packets on the sockets
while waiting for a member with the primary bucket.
So in short, each new client connection is “unresponsive”. The client tries
to close it a open a new one, but the socket doesn’t get closed on server side
and the connection is left “hanging” on the server. Clients will try to do this
until max-connections is reached on the servers. This is why we would be unable
to add any data to the regions. But IMHO it’s really not dependent on adding
data, since this issue happens occasionally (1 out of ~4 restarts) and only on
one server.
The initial problem was observed with a persistent region A (with 10000
key-value pairs inserted) and a non-persistent region B collocated with region
A. We did some tests with both regions being persistent. We haven’t observed
the same issue yet (although we did only a few restarts), but we observed
something that also looks quite worrying. Both servers start up without
reporting issues in the logs. But, looking at the server metrics, one server
has wrong information about “bucketCount” and is missing primary buckets. E.g:
First server:
Partition | putLocalRate | 0.0
| putRemoteRate | 0.0
| putRemoteLatency | 0
| putRemoteAvgLatency | 0
| bucketCount | 113
| primaryBucketCount | 57
Second server:
Partition | putLocalRate | 0.0
| putRemoteRate | 0.0
| putRemoteLatency | 0
| putRemoteAvgLatency | 0
| bucketCount | 111
| primaryBucketCount | 55
So we are missing a primary bucket without being aware of the issue.
BR,
Mario
________________________________
Šalje: Anilkumar Gingade <aging...@vmware.com>
Poslano: 11. rujna 2020. 20:34
Prima: dev@geode.apache.org <dev@geode.apache.org>
Predmet: Re: Colocated regions missing some buckets after restart
Are you seeing no-buckets for persistent regions or non-persistent. The
buckets are created dynamically; when data is added to corresponding buckets...
When server is restarted, in case of in-memory regions as the data is not
there, the bucket region may not have been created (my suspicion).
Can you try adding data and see if the co-located bucket region gets
created in respective nodes/server.
-Anil.
On 9/11/20, 9:46 AM, "Mario Kevo" <mario.k...@est.tech> wrote:
Hi geode-dev,
We have a system with two servers and a few regions. One region is
persistent and other are not but they are colocated with this persistent region.
After servers restart on some region we can see that they don't have
any bucket.
gfsh>show metrics --member=server-1 --region=/region1
--categories=partition
Metrics for region:/region1 On Member server-1
Category | Metric | Value
--------- | ---------------------------- | -----
partition | putLocalRate | 0.0
| putRemoteRate | 0.0
| putRemoteLatency | 0
| putRemoteAvgLatency | 0
| bucketCount | 0
| primaryBucketCount | 0
| configuredRedundancy | 1
| actualRedundancy | 0
| numBucketsWithoutRedundancy | 113
| totalBucketSize | 0
gfsh>show metrics --member=server-0 --region=/region1
--categories=partition
Metrics for region:/region1 On Member server-0
Category | Metric | Value
--------- | ---------------------------- | -----
partition | putLocalRate | 0.0
| putRemoteRate | 0.0
| putRemoteLatency | 0
| putRemoteAvgLatency | 0
| bucketCount | 113
| primaryBucketCount | 56
| configuredRedundancy | 1
| actualRedundancy | 0
| numBucketsWithoutRedundancy | 113
| totalBucketSize | 0
The persistent region is ok, but some of these colocated regions has
this issue. We also wait some time, but it doesn't change.
Does anyone have some idea about this problem, what causing the issue?
The issue can be easily reproduced with two locators, two servers, one
persistent region and few non-persistent regions colocated with persistent one.
After restart both servers and try to do show metrics command you will
got this issue for some regions.
BR,
Mario
