[
https://issues.apache.org/jira/browse/CASSANDRA-8022?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14200513#comment-14200513
]
Michael Shuler commented on CASSANDRA-8022:
-------------------------------------------
Without using hostnames, do container IP addresses work with cqlsh? If not,
then it seems to be a host<->guest network routing problem. If IPs work, then
it's a DNS resolution problem. I would guess that $hostname on the host and in
container resolve different IP addresses?
> cqlsh hangs indefinitely within a Docker container connecting to itself with
> hostname
> -------------------------------------------------------------------------------------
>
> Key: CASSANDRA-8022
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8022
> Project: Cassandra
> Issue Type: Bug
> Components: Tools
> Environment: Ubuntu 14.04, running Docker, run inside a Ubuntu 14.04
> container.
> Reporter: Matthew O'Riordan
> Labels: cqlsh
>
> I am unable to use the `cqlsh` tool within a Docker container running
> Cassandra. Previously I would use the Java & Thrift based `cqlsh` tool as
> follows:
> ```
> cqlsh --username cassandra --password whatever $(hostname)
> ```
> When I run the `cqlsh` command after attaching to a running container (I use
> LXC containerisation that allows attaching to a running container and running
> a console), it simply hangs and never reports an error. With the `--debug`
> flag on, I get the following with:
> **cqlsh 4.1.1**
> ```
> $ cqlsh --debug --username cassandra --password obfuscated $(hostname)
> Using CQL driver: <module 'cql' from
> '/usr/share/cassandra/lib/cql-internal-only-1.4.1.zip/cql-1.4.1/cql/__init__.py'>
> Using thrift lib: <module 'thrift' from
> '/usr/share/cassandra/lib/thrift-python-internal-only-0.9.1.zip/thrift/__init__.py'>
> ```
> It then hangs in this state indefinitely, I have no errors from `cqlsh` and
> no errors in the Cassandra log.
> **cqlsh 5.0.1**
> ```
> $ cqlsh --debug --username cassandra --passwor obfuscated $(hostname)
> Using CQL driver: <module 'cassandra' from
> '/usr/share/cassandra/lib/cassandra-driver-internal-only-2.1.0.post.zip/cassandra-driver-2.1.0.post/cassandra/__init__.py'>
> ```
> It then also hangs in this state indefinitely, I have no errors from `cqlsh`
> and no errors in the Cassandra log.
> What's interesting, and quite confusing is that:
> * I can telnet within the container as follows `telnet $(hostname) 9042` and
> I get a socket. When trying to issue some commands, I see Protocol errors in
> the Cassandra log thus verifying that the port is indeed open on the host
> that resolves from $(hostname)
> * If I `cqlsh` from another container or another host to the Cassandra
> container it works just fine.
> * I have tried disabling authentication altogether and using the
> AllowAllAuthenticator, and I experience the same problem.
> * `nodetool` works fine
> In the mean time, I am forced to `cqlsh` from another container as a
> workaround. Happy to try and do anything require to diagnose the cause of
> this problem.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
