From user-return-63349-archive-asf-public=cust-asf.ponee.io@cassandra.apache.org Mon Mar 4 09:42:21 2019 Return-Path: X-Original-To: archive-asf-public@cust-asf.ponee.io Delivered-To: archive-asf-public@cust-asf.ponee.io Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by mx-eu-01.ponee.io (Postfix) with SMTP id 28CDE180627 for ; Mon, 4 Mar 2019 10:42:19 +0100 (CET) Received: (qmail 27216 invoked by uid 500); 4 Mar 2019 09:42:18 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 27206 invoked by uid 99); 4 Mar 2019 09:42:18 -0000 Received: from pnap-us-west-generic-nat.apache.org (HELO spamd3-us-west.apache.org) (209.188.14.142) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 04 Mar 2019 09:42:18 +0000 Received: from localhost (localhost [127.0.0.1]) by spamd3-us-west.apache.org (ASF Mail Server at spamd3-us-west.apache.org) with ESMTP id 70CED18259E for ; Mon, 4 Mar 2019 09:42:17 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at spamd3-us-west.apache.org X-Spam-Flag: NO X-Spam-Score: 2.799 X-Spam-Level: ** X-Spam-Status: No, score=2.799 tagged_above=-999 required=6.31 tests=[DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_REPLY=1, HTML_MESSAGE=2, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=disabled Authentication-Results: spamd3-us-west.apache.org (amavisd-new); dkim=pass (2048-bit key) header.d=yahoo.com Received: from mx1-lw-eu.apache.org ([10.40.0.8]) by localhost (spamd3-us-west.apache.org [10.40.0.10]) (amavisd-new, port 10024) with ESMTP id 9s04Dj8xAAOB for ; Mon, 4 Mar 2019 09:42:15 +0000 (UTC) Received: from sonic315-10.consmr.mail.gq1.yahoo.com (sonic315-10.consmr.mail.gq1.yahoo.com [98.137.65.34]) by mx1-lw-eu.apache.org (ASF Mail Server at mx1-lw-eu.apache.org) with ESMTPS id 470C05F3EF for ; Mon, 4 Mar 2019 09:42:14 +0000 (UTC) X-YMail-OSG: a5oDaK4VM1mnRFQeHcphvWme3RcgvAT_Bvonk74oNIvqVSQz6Rqm1hNBfuL5n84 .qan2kksnCH6xSxAPGAtH.ZZY9DVBrf8YbirtUg27FbNo.0_j6asbtu5j4NhUZsk6hs7IWYp0pqZ mbYptS4r8NBfEqlIkjDsU5ibC7tEcAsJJhFNq6s9BdRMUQAJLFyf125DRatWZ7Xuo3FFj9z0HGcY tihrvEsCzMCMFft0NCy3q_0d1m94SKwEDECjRPI10IchiJEPAp75LsNmngKgur0aiv0f4DGsuWDk zBPS2G8Q9ScsgMfgEzjwR8qlxdcZ39wZ2NtpwKk5ZbqS_b_m9zlm.mbNRaw6b8_WGO7gdoEtzJP1 XxOHIGcsMlu8LM5l7_SUQHzpDMWE2.bppoqil6OfgczHR01JcBoTjr3ev5hEnn1tG8b88QqhTEH. 2.2OypnGluo83mOs3.pd6oLLsLbWPXNdI0w5bzcuralqjjPXIKdlFcMwwr96apOePWNeRuypS0Un FwwchIkxqrV7XvvcTAb653dk8CIJfeArppCwjpmsBr3dKf42EiFUIjwAre02YaUCXDgKNe2kY6QV jiLhd9v7WeJnplTJ6VxoBPlPCeDjcCbb4U3l.EB.hjZG38jcZi0Mp5.F1CPW8NdBKpKnqm1ShZcb Io3FW0S2.JgvBRQ6Tzkcc.X7spx9YWMpaNPGMWBL_pOje3GQqusbLkItvUqPE9AV5HpVFJRP1cDa SAaCASQqv2AlojtujWOBIhXDiyR7t0MEgoQscVOl2QoI8vDN5ei8WRjk3SkS6oxYVpt_EKFm1tZp Raq8aIQTnymsMZbAq8efTfsIKs0qFdkpuSLXSS7QFSNrN_yN.28aPef10uGPQxOeAyTqH6HUUfo8 iJ54pgD2_KwORlSHuVP.8eT2T1HQZvWVUkearzrpXLG_bkr7TZz8Hw9Z5Ab0nqRx3vCivZkbvx1q jhup_XbKF5NuXa1Kfb8IdFUQub7iwyULHPKLt_RHj.EAS2b_xIKxXctxuL9fzL0v40NW4xuU- Received: from sonic.gate.mail.ne1.yahoo.com by sonic315.consmr.mail.gq1.yahoo.com with HTTP; Mon, 4 Mar 2019 09:42:06 +0000 Received: from c-24-10-87-155.hsd1.ca.comcast.net (EHLO i7) ([24.10.87.155]) by smtp408.mail.gq1.yahoo.com (Oath Hermes SMTP Server) with ESMTPA ID f7a208f806aa6cad16053910207c967b for ; Mon, 04 Mar 2019 09:42:05 +0000 (UTC) From: "Kenneth Brotman" To: References: ,<000001d4cf97$5e9c9b40$1bd5d1c0$@yahoo.com> ,<000601d4d03e$00c3d1d0$024b7570$@yahoo.com> In-Reply-To: Subject: RE: MV's stuck in build state Date: Mon, 4 Mar 2019 01:42:03 -0800 Message-ID: <000301d4d26e$862f9d90$928ed8b0$@yahoo.com> MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_NextPart_000_0004_01D4D22B.78111880" X-Mailer: Microsoft Outlook 14.0 Thread-Index: AQFQCsb7SiX8VpEJYRvq1icVsmKhjwHlZ3fvAkNahRkBhgkkeAJGTyYLAinvf/Gms8sIYA== Content-Language: en-us ------=_NextPart_000_0004_01D4D22B.78111880 Content-Type: multipart/alternative; boundary="----=_NextPart_001_0005_01D4D22B.78111880" ------=_NextPart_001_0005_01D4D22B.78111880 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Hi Dipan, What is the state of the dev and production clusters now? How big is the production cluster? How many nodes on each cluster spin out of control? On the production cluster, the data is 67 MB, you'd have use a value at least twice that size as the commitlog_segment_size. Of course you don't want to leave it really high if you do change it. On the dev cluster the data is 18 MB, you used a value way over twice size when you bumped the commitlog_sement_size to 128 MB, but in doing so you are wasting a lot of memory capacity of course, but you say it didn't fix the problem on that cluster, so. is the message you are getting reflecting this change by showing to be 128 MB now or is it still a different value? Is there another problem too perhaps you were running low on capacity on the node? Could low capacity be a problem on either cluster? From: Dipan Shah [mailto:dipan.sha@hotmail.com] Sent: Monday, March 04, 2019 12:52 AM To: Kenneth Brotman; user@cassandra.apache.org Subject: Re: MV's stuck in build state Hello Kenneth, Apologies for the late reply. 1) On production the value of x was 67 MB and y was 16 MV as value of commitlog_segment_size_in_mb is 32. 2) On Dev the value of x was 18 MB and y was 16 MV as value of commitlog_segment_size_in_mb was 32 initially. I had bumped up the value of commitlog_segment_size_in_mb to 128 when the node eventually crashed. 3) No I did not try org.apache.cassandra.db:type=CompactionManager but I did try "nodetool stop" and "nodetool stop VIEW_BUILD". Thanks, Dipan Shah _____ From: Kenneth Brotman Sent: Friday, March 1, 2019 8:19 PM To: user@cassandra.apache.org Subject: RE: MV's stuck in build state Dipan, On your production cluster, when you were first getting the "Mutation of bytes ." message, what was the value of x and y? How about when you got the message on the Dev Cluster, what was the value of x and y in that message? On the Dev cluster, did you try going into JMX and directly hitting the org.apache.cassandra.db:type=CompactionManager mbean's stopCompaction operation? From: Dipan Shah [mailto:dipan.sha@hotmail.com] Sent: Friday, March 01, 2019 12:56 AM To: Kenneth Brotman; user@cassandra.apache.org Subject: Re: MV's stuck in build state Hello Kenneth, Thanks for replying. I had actually tried this on a Dev environment earlier and it caused the node to spin out of control. I'll explain what I did over there: 1) Found "Mutation of bytes is too large for the maxiumum size of " and thus increased the value of "commitlog_segment_size_in_mb" to 64 2) This worked for a few minutes and again the view started failing when it hit the new limits and the messages now were "Mutation of bytes is too large for the maxiumum size of 2*" 3) So just to try I increased the value to 128 4) Now after this change the node started crashing as soon as I brought the service online. I was not able to recover even after restoring the value of "commitlog_segment_size_in_mb" to 32 Now there is a key differences to that issue and what I am facing currently: The views were not dropped on the earlier environment whereas I have already dropped the view on the current environment (and cant experiment much as the current environment is in production). I know this is a bit tricky but I'm pretty much stuck over here and thinking of finding a non-problem creating solution over here. Thanks, Dipan Shah _____ From: Kenneth Brotman Sent: Friday, March 1, 2019 12:26 AM To: user@cassandra.apache.org Subject: RE: MV's stuck in build state Hi Dipan, Did you try following the advice in the referenced DataStax article called Mutation of bytes is too large for the maximum size of as suggested in the stackoverflow.com post you cited? Kenneth Brotman From: Dipan Shah [mailto:dipan.sha@hotmail.com] Sent: Thursday, February 28, 2019 2:23 AM To: Dipan Shah; user@cassandra.apache.org Subject: Re: MV's stuck in build state Forgot to add version info. This is on 37. [cqlsh 5.0.1 | Cassandra 3.7 | CQL spec 34.2 | Native protocol v4] Thanks, Dipan Shah _____ From: Dipan Shah Sent: Thursday, February 28, 2019 3:38 PM To: user@cassandra.apache.org Subject: MV's stuck in build state Hello All, I have a few MV's that are stuck in build state because of a bad schema design and thus getting a lot of messages like this "Mutation xxx is too large for maximum size of 16.000MiB". I have dropped those MV's and I can no longer see their schema in the keyspace. But they are visible under "system.views_build_in_progress" and "nodetool viewbuildstatus" I have tried "nodetool stop VIEW_BUILD" as suggested here: https://stackoverflow.com/questions/40553499/stop-cassandra-materialized-vie w-build and have also reboot a few nodes in the cluster. This has also not helped. Is there anything else that can be done over here? Stop Cassandra Materialized View Build - Stack Overflow Its not documented, but nodetool stop actually takes any compaction type, not just the ones listed (which the view build is one of). So you can simply: nodetool stop VIEW_BUILD Or you can hit JMX directly with the org.apache.cassandra.db:type=CompactionManager mbean's stopCompaction operation.. All thats really gonna do is set a flag for the view builder to stop on its next loop. stackoverflow.com Thanks, Dipan Shah ------=_NextPart_001_0005_01D4D22B.78111880 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi Dipan,

 

What is the state of the dev and production clusters now?  =

How big is the production cluster?

How many nodes on each cluster spin out of = control?

 

On the production cluster, the data is 67 MB, you’d have use a = value at least twice that size as the commitlog_segment_size.  Of = course you don’t want to leave it really high if you do change = it. 

On the dev cluster the data is 18 MB, you used a value way over twice = size when you bumped the commitlog_sement_size to 128 MB, but in doing = so you are wasting a lot of memory capacity of course, but you say it = didn’t fix the problem on that cluster, so… is the message = you are getting reflecting this change by showing <y> to be 128 MB = now or is it still a different value?

 

Is there another problem too perhaps you were running low on capacity = on the node?  Could low capacity be a problem on either cluster? =

 

 

From:= = Dipan Shah [mailto:dipan.sha@hotmail.com]
Sent: Monday, March = 04, 2019 12:52 AM
To: Kenneth Brotman; = user@cassandra.apache.org
Subject: Re: MV's stuck in build = state

 

Hello = Kenneth,

 

Apologies for = the late reply.

 

1) On = production the value of x was 67 MB and y was 16 MV as value = of commitlog_segment_size_in_mb is = 32.

2) On Dev the value of x was 18 MB and y was 16 MV as value = of commitlog_segment_size_in_mb was 32 initially. I had bumped up = the value of commitlog_segment_size_in_mb to 128 when the node = eventually crashed.

3) No I did not try org.apache.cassandra.db:type=3DCompactionManager = ;but I did try "nodetool stop" and "nodetool stop = VIEW_BUILD".

 

Thanks,

Dipan = Shah

From: Kenneth Brotman <kenbrotman@yahoo.com.INVALID>
Sent: = Friday, March 1, 2019 8:19 PM
To: = user@cassandra.apache.org
Subject: RE: MV's stuck in build = state

 

Dipan,

 

On your production cluster, when you were first getting the = “Mutation of <x> bytes …” message, what was the = value of x and y?

How about when you got the message on the Dev Cluster, what was the = value of x and y in that message?

On the Dev cluster, did you try going into JMX and directly hitting = the org.apache.cassandra.db:type=3DCompactionManager mbean's = stopCompaction operation?

 

 

From:= = Dipan Shah [mailto:dipan.sha@hotmail.com]
Sent: Friday, March = 01, 2019 12:56 AM
To: Kenneth Brotman; = user@cassandra.apache.org
Subject: Re: MV's stuck in build = state

 

Hello = Kenneth,

 

Thanks for = replying.

 

I had actually = tried this on a Dev environment earlier and it caused the node to spin = out of control. I'll explain what I did over = there:

 

1) Found = "Mutation of <x> bytes is too large for the maxiumum size of = <y>" and thus increased the value of "commitlog_segment_size_in_mb" to = 64

2) This worked = for a few minutes and again the view started failing when it hit the new = limits and the messages now were "Mutation of <x> bytes is too = large for the maxiumum size of = 2*<y>"

3) So just to try I increased the value to = 128

4) Now after this change the node started crashing as soon as I brought = the service online. I was not able to recover even after restoring the = value of "commitlog_segment_size_in_mb" to = 32

 

Now there is a key differences to that issue and what I am facing = currently:

 

The views were not dropped on the earlier environment whereas I have = already dropped the view on the current environment (and cant experiment = much as the current environment is in = production).

 

I know this is = a bit tricky but I'm pretty much stuck over here and thinking of finding = a non-problem creating solution over = here.

 

Thanks,

Dipan = Shah

From: Kenneth Brotman <kenbrotman@yahoo.com.INVALID>
Sent: = Friday, March 1, 2019 12:26 AM
To: = user@cassandra.apache.org
Subject: RE: MV's stuck in build = state

 

Hi Dipan,

 

Did you try following the advice in the referenced DataStax article = called Mutation of = <x> bytes is too large for the maximum size of <y> as = suggested in the stackoverflow.com post you = cited?

 

Kenneth Brotman

 

From:= = Dipan Shah [mailto:dipan.sha@hotmail.com]
Sent: Thursday, = February 28, 2019 2:23 AM
To: Dipan Shah; = user@cassandra.apache.org
Subject: Re: MV's stuck in build = state

 

Forgot to add = version info. This is on 37.

 

[cqlsh 5.0.1 | = Cassandra 3.7 | CQL spec 34.2 | Native protocol = v4]

 

Thanks,

Dipan = Shah

From: Dipan Shah <dipan.sha@hotmail.com>
Sent: Thursday, = February 28, 2019 3:38 PM
To: = user@cassandra.apache.org
Subject: MV's stuck in build = state

 

Hello = All,

 

I have a few = MV's that are stuck in build state because of a bad schema design and = thus getting a lot of messages like this "Mutation xxx is too large for maximum size of = 16.000MiB".

 

 

I have dropped = those MV's and I can no longer see their schema in the keyspace. But = they are visible under "system.views_build_in_progress" and = "nodetool viewbuildstatus"

 

I have tried = "nodetool stop VIEW_BUILD" as = suggested here: https://stackoverflow.com/questions/40553499/stop-cassan= dra-materialized-view-build and have also reboot a few nodes in = the cluster. This has also not = helped.

 

Is there = anything else that can be done over = here?

Its not documented, but nodetool stop = actually takes any compaction type, not just the ones listed (which the = view build is one of). So you can simply: nodetool stop VIEW_BUILD Or = you can hit JMX directly with the = org.apache.cassandra.db:type=3DCompactionManager mbean's stopCompaction = operation.. All thats really gonna do is set a flag for the view builder = to stop on its next loop.

stackoverflow.com

 

 

Thanks,

Dipan = Shah

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