RE: openjdk for cassandra production cluster

I’m using OpenJDK on version 3.10 (rehl 7.3) in Production and have the warning in the logs. I have a stable system, I think you can ignore it. From: Jonathan Haddad [mailto:j...@jonhaddad.com] Sent: 10 October 2018 15:46 To: user@cassandra.apache.org Subject: Re: openjdk for cassandra production

Rolling back Cassandra upgrades (tarball)

Hi community, Wonder if you can help me. I have a cluster on v3.0.11 I am planning to upgrade this to 3.10. Is rolling back the binaries a viable solution? From reading blogs and such, I’ve read that downgrading is a no-no. Whilst it is possible literally and in theory possible, many of the Cas

RE: Error during truncate: Cannot achieve consistency level ALL , how to fix it

What RF is your system_auth keyspace? If its one, match it to the user keyspace, and restart the node. From: sha p [mailto:shatestt...@gmail.com] Sent: 19 September 2018 11:49 To: user@cassandra.apache.org Subject: Error during truncate: Cannot achieve consistency level ALL , how to fix it Hi A

RE: JOB | Permanent Java Development Manager (Montreal, Canada)

Agree we don't need this. -Original Message- From: Tobin Landricombe [mailto:to...@sensatus.com] Sent: 01 August 2018 16:21 To: user@cassandra.apache.org Subject: Re: JOB | Permanent Java Development Manager (Montreal, Canada) Spam. Let this one in and the channel will fill up with them.

RE: Cassandra recommended server uptime?

I haven’t restarted a node (service) unless there are changes made to config, and for restarting the server its incredibly rare. In fact since Production has been up I think ive restrted the servers twice (both for DR occurences) in a Year. There is very little need to reboot the servers and un

RE: How do you monitoring Cassandra Cluster?

I’m using Quest Foglight, very good if you have budget for it?? Jonathan Baynes DBA Tradeweb Europe Limited Moor Place • 1 Fore Street Avenue • London EC2Y 9DT P +44 (0)20 77760988 • F +44 (0)20 7776 3201 • M +44 (0)7884111546 jonathan.bay...@tradeweb.com [cid:image001.jpg@01CD26AD

Nodetool Repair --full

Hi Community, Can someone confirm, as the documentation out on the web is so contradictory and vague. Nodetool repair -full if I call this, do I need to run this on ALL my nodes or is just the once sufficient? Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street

Node fails to start - error in Log (CassandraDaemon.java:710 - Exception encountered during startup)

) Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street Avenue * London EC2Y 9DT P +44 (0)20 77760988 * F +44 (0)20 7776 3201 * M +44 (0)7884111546 jonathan.bay...@tradeweb.com [cid:image001.jpg@01CD26AD.4165F110]<http://www.tradeweb.com/> fol

Tracing cql code being run through the drive

Has anyone had any experience in doing this? Thanks in advance. J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street Avenue * London EC2Y 9DT P +44 (0)20 77760988 * F +44 (0)20 7776 3201 * M +44 (0)7884111546 jonathan.bay...@tradeweb.com [cid:image001.jpg@01CD26AD.4165

RE: node restart causes application latency

I’m following this intensely as the discussion is important to me as well in understanding the restarting of a node correctly, currently (3.0.11) I run Disable thrift, disable gossip then drain, from reading this If I understand correctly is there any point in doing anything other than drain? F

RE: Issue with New Production Cluster

immediately, does it reconnect? Anything in the logs? What you describe is atypical - timeouts on queries can (and will) happen occasionally under load, but timeout on connect is atypical. Any sign of networking issues/slowness/dns problems/etc? On Fri, Sep 29, 2017 at 6:43 AM, Jonathan Baynes

Issue with New Production Cluster

telnet on all ports and they are all up and connecting. Checked the PID is up for cassandra (it is) Any idea how I can debug the cause of this further? Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street Avenue * London EC2Y 9DT P +44 (0)20 77760988 * F +4

RE: Understanding Messages in the Debug.log

correlation with other entries in the debug log, or start inspecting the heap/thread pools with some combination of tpstats and dumping the heap and looking at the running threads may give you an indication of what’s going on. -- Jeff Jirsa On Sep 21, 2017, at 4:37 AM, Jonathan Baynes

RE: Understanding Messages in the Debug.log

m=0LpreILsiIHqijRbJ-hSyC7R1Hq3hMhquXS3xcIDLjo&s=T5vuzfn8ElJgnkkZ4sQTkQUMwN-_GEOacqRbeVayQUQ&e=> -- Jacob Shadix On Thu, Sep 21, 2017 at 4:56 AM, Jonathan Baynes mailto:jonathan.bay...@tradeweb.com>> wrote: Good Morning Community, Can anyone help me understand what these messages (and I have a lot

Understanding Messages in the Debug.log

p that would be great. Or if they can be ignored, how do I supress these? Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street Avenue * London EC2Y 9DT P +44 (0)20 77760988 * F +44 (0)20 7776 3201 * M +44 (0) xx jonathan.bay...@tradeweb.com [cid:image0

RE: Cassandra - Nodes can't restart due to java.lang.OutOfMemoryError: Direct buffer memory

: Cassandra - Nodes can't restart due to java.lang.OutOfMemoryError: Direct buffer memory I am usingCassandra 3.9 with cqlsh 5.0.1. 在 2017年8月31日，下午5:54，Jonathan Baynes mailto:jonathan.bay...@tradeweb.com>> 写道： again _

RE: Cassandra - Nodes can't restart due to java.lang.OutOfMemoryError: Direct buffer memory

Can you tell us what version you are on? -Original Message- From: qf zhou [mailto:zhouqf2...@gmail.com] Sent: 31 August 2017 10:52 To: user@cassandra.apache.org Subject: Cassandra - Nodes can't restart due to java.lang.OutOfMemoryError: Direct buffer memory I am running a cluster with 3

RE: system_auth replication factor in Cassandra 2.1

I recently came across an issue where by my user Keyspace was replicated by 3 (I have 3 nodes) but my system_auth was default to 1, we also use authentication, I then lost 2 of my nodes and because authentication wasn’t replicated I couldn’t log in. Once I resolved the issue, and got the nodes

Cassandra Setup Question

we want the data to replicate across both DCs , so that in the event of a DC failure the second DC acts as our DR DC and has all the data as well. The Consistency will be Quorum, but replication Factor does that need to be 3 or 6. Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor

RE: C* 3 node issue -Urgent

@Kurt, You have hit the nail on the head. Whilst it was an issue with the cassandra-env.sh file, and I fixed this by overwriting it with the default file, essentially rolling it back, which got me back in, the larger issue is with the system_auth db it is a REPL factor of 1 and thus as stated i

RE: C* 3 node issue -Urgent

AllowAllAuthenticator in the yaml. Cheers, Akhil On 23/08/2017, at 8:59 PM, Jonathan Baynes mailto:jonathan.bay...@tradeweb.com>> wrote: I will also mention I am on: C* 3.0.11 Linux Oracle red hat 7.1 Java 1.8.0.31 Python 2.7 From: Jonathan Baynes Sent: 23 August 2017 09:47 To:

RE: C* 3 node issue -Urgent

: Re: C* 3 node issue -Urgent The cqlsh image say bad credentials. Just confirming that you have the correct username/password when logging on. By turing on authentication I am assuming you mean using the PasswordAuthenticator instead of the AllowAllAuthenticator in the yaml. Cheers, Akhil On

RE: C* 3 node issue -Urgent

I will also mention I am on: C* 3.0.11 Linux Oracle red hat 7.1 Java 1.8.0.31 Python 2.7 From: Jonathan Baynes Sent: 23 August 2017 09:47 To: 'user@cassandra.apache.org' Cc: Stewart Allman Subject: C* 3 node issue -Urgent Hi Everyone. I need the communities help here. I have atte

C* 3 node issue -Urgent

.java:2197) ~[guava-18.0.jar:na] ... 38 common frames omitted Caused by: org.apache.cassandra.exceptions.UnavailableException: Cannot achieve consistency level LOCAL_ONE I have no idea what to do, so any help would be amazing right now.. Thanks J Jonathan Baynes DBA Tradeweb Europe Limi

Re: Removing Columns from production table

Thanks Jeff I have a horrible feeling it may be. I'll get the errors from the dev guys Monday and email the group, hopefully I can tie this down. Thanks Sent from my iPhone > On 18 Aug 2017, at 17:24, Jeff Jirsa wrote: > > Cassandra-13004 ___

Removing Columns from production table

Hi Is there anything I need to do after dropping a column and adding in a column to flush cassandra of the changes? We are experiencing issues with our front end application, and the developers are asking if the issue was caused by the change in schema, as I've done the drop and add of a column

Re: Starting Cassandrs after restore of Data - get error

ote: Jonathan, Make sure initial tokens have values from back up cluster i.e. 256 tokens. It is possible to have typo. On Jul 7, 2017, at 9:14 AM, Jonathan Baynes mailto:jonathan.bay...@tradeweb.com>> wrote: Hi again, Trying to restart my nodes after restoring snapshot data, initial tokens

Starting Cassandrs after restore of Data - get error

gt; /tmp/tokens when pasting in the tokens originally I got the an error, but this was due to the spacing between the tokens. That error has been resolved I'm just left with this one? Any ideas Thanks J Jonathan Baynes DBA Tradeweb Europe Limited Moor Place * 1 Fore Street Avenue * Lond

Move Production data to Development Cluster

on the SSTable.. Advice I've tried this so many ways its getting confusing.. what's right? Can anyone give me some pointers as to the best route to migrate data from cluster to cluster? The Documentation is so vague and not detailed enough? Do I copy the snapshots from all the nodes? Do

RE: Cassandra issue “Unable to gossip with any seeds”

Hi Bhargav I had this recently when making changes to a cluster, and It was down to the Listen_address & broadcast_address. Check your cassandra.yaml and make sure that your listen_address/broadcast_address and "seeds" values match. Make sure the Data folder is empty as well. I would go throu