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https://issues.apache.org/jira/browse/CASSANDRA-20051?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Tibor Repasi updated CASSANDRA-20051:
-------------------------------------
    Description: 
During re-deploying lots of Cassandra nodes I've observed that some nodes does 
not reliably reload the seeds when {{nodetool reloadseeds}} command was issued.

After the seeds list was changed in the config:
{code}
$ grep seeds /etc/cassandra/cassandra.yaml
 - seeds: 10.90.44.82
$ nodetool getseeds
Current list of seed node IPs, excluding the current node's IP: 
/10.90.40.86:7000 /10.90.44.86:7000
$ nodetool reloadseeds
Updated seed node IP list, excluding the current node's IP: /10.90.40.86:7000 
/10.90.44.86:7000
{code}

At this instance the following line was logged to debug.log:
{code}
DEBUG [RMI TCP Connection(103568)-127.0.0.1] 2024-11-04 14:04:27,638 
YamlConfigurationLoader.java:124 - Loading settings from 
file:/etc/cassandra/cassandra.yaml
{code}

However, getting the old list:
{code}
$ nodetool getseeds
Current list of seed node IPs, excluding the current node's IP: 
/10.90.40.86:7000 /10.90.44.86:7000
{code}

These nodes read the seed list only after Cassandra was restarted:

{code}
$ sudo systemctl restart cassandra.service
$ nodetool getseeds
Seed node list does not contain any remote node IPs
{code}

Note: this was observed on a seed node.

Observed on Cassandra 4.1.7.

  was:
During re-deploying lots of Cassandra nodes I've observed that some nodes does 
not reliably reload the seeds when {{nodetool reloadseeds}} command was issued.

After the seeds list was changed in the config:
{code}
$ grep seeds /etc/cassandra/cassandra.yaml
 - seeds: 10.90.44.82
$ nodetool getseeds
Current list of seed node IPs, excluding the current node's IP: 
/10.90.40.86:7000 /10.90.44.86:7000
$ nodetool reloadseeds
Updated seed node IP list, excluding the current node's IP: /10.90.40.86:7000 
/10.90.44.86:7000
{code}

At this instance the following line was logged to debug.log:
{code}
DEBUG [RMI TCP Connection(103568)-127.0.0.1] 2024-11-04 14:04:27,638 
YamlConfigurationLoader.java:124 - Loading settings from 
file:/etc/cassandra/cassandra.yaml
{code}

However, getting the old list:
{code}
$ nodetool getseeds
Current list of seed node IPs, excluding the current node's IP: 
/10.90.40.86:7000 /10.90.44.86:7000
{code}

These nodes read the seed list only after Cassandra was restarted:

{code}
$ sudo systemctl restart cassandra.service
$ nodetool getseeds
Seed node list does not contain any remote node IPs
{code}

Note: this was observed on a seed node.


> nodetool reloadseeds does not actually reload the seeds
> -------------------------------------------------------
>
>                 Key: CASSANDRA-20051
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-20051
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local/Config
>            Reporter: Tibor Repasi
>            Priority: Normal
>
> During re-deploying lots of Cassandra nodes I've observed that some nodes 
> does not reliably reload the seeds when {{nodetool reloadseeds}} command was 
> issued.
> After the seeds list was changed in the config:
> {code}
> $ grep seeds /etc/cassandra/cassandra.yaml
>  - seeds: 10.90.44.82
> $ nodetool getseeds
> Current list of seed node IPs, excluding the current node's IP: 
> /10.90.40.86:7000 /10.90.44.86:7000
> $ nodetool reloadseeds
> Updated seed node IP list, excluding the current node's IP: /10.90.40.86:7000 
> /10.90.44.86:7000
> {code}
> At this instance the following line was logged to debug.log:
> {code}
> DEBUG [RMI TCP Connection(103568)-127.0.0.1] 2024-11-04 14:04:27,638 
> YamlConfigurationLoader.java:124 - Loading settings from 
> file:/etc/cassandra/cassandra.yaml
> {code}
> However, getting the old list:
> {code}
> $ nodetool getseeds
> Current list of seed node IPs, excluding the current node's IP: 
> /10.90.40.86:7000 /10.90.44.86:7000
> {code}
> These nodes read the seed list only after Cassandra was restarted:
> {code}
> $ sudo systemctl restart cassandra.service
> $ nodetool getseeds
> Seed node list does not contain any remote node IPs
> {code}
> Note: this was observed on a seed node.
> Observed on Cassandra 4.1.7.



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