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Date: Mon, 31 Aug 2015 16:49:06 -0700
From: Jordan Zimmerman <jordan@jordanzimmerman.com>
To: Cameron McKenzie <mckenzie.cam@gmail.com>, user@curator.apache.org
Message-ID: <etPan.55e4e7f2.70795fd9.217@jordans-mbp.bluejeansnet.com>
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Subject: Re: NodeExistsException with Shared Value recipe in Curator
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Why would this be needed=3F It adds an additional ZK call for no good rea=
son. If the node exists, the exception is thrown. In any event, even if c=
heckExists() succeeds there=E2=80=99s a chance that another process can c=
reate the node before the create() call is made. So, it doesn=E2=80=99t d=
o what you want anyway.

-Jordan

On August 31, 2015 at 2:46:09 PM, Cameron McKenzie (mckenzie.cam=40gmail.=
com) wrote:

Would it be possible in the future to have Curator have the option to run=
 a checkExists() before the .start() call on a recipe like Shared-Value=3F=
 Is the extra overhead not worth the trouble=3F


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<html><head><style>body=7Bfont-family:Helvetica,Arial;font-size:13px=7D</=
style></head><body style=3D=22word-wrap: break-word; -webkit-nbsp-mode: s=
pace; -webkit-line-break: after-white-space;=22><div id=3D=22bloop=5Fcust=
omfont=22 style=3D=22font-family:Helvetica,Arial;font-size:13px; color: r=
gba(0,0,0,1.0); margin: 0px; line-height: auto;=22>Why would this be need=
ed=3F It adds an additional ZK call for no good reason. If the node exist=
s, the exception is thrown. In any event, even if checkExists() succeeds =
there=E2=80=99s a chance that another process can create the node before =
the create() call is made. So, it doesn=E2=80=99t do what you want anyway=
.</div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22font-family:Helvetic=
a,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px; line-height:=
 auto;=22><br></div><div id=3D=22bloop=5Fcustomfont=22 style=3D=22font-fa=
mily:Helvetica,Arial;font-size:13px; color: rgba(0,0,0,1.0); margin: 0px;=
 line-height: auto;=22>-Jordan</div> <br><p class=3D=22airmail=5Fon=22 st=
yle=3D=22color:=23000;=22>On August 31, 2015 at 2:46:09 PM, Cameron McKen=
zie (<a href=3D=22mailto:mckenzie.cam=40gmail.com=22>mckenzie.cam=40gmail=
.com</a>) wrote:</p> <blockquote type=3D=22cite=22 class=3D=22clean=5Fbq=22=
><span><div><div dir=3D=22ltr=22 style=3D=22color: rgb(0, 0, 0); font-fam=
ily: 'helvetica Neue', helvetica; font-size: 13px; font-style: normal; fo=
nt-variant: normal; font-weight: normal; letter-spacing: normal; line-hei=
ght: 19.5px; orphans: auto; text-align: start; text-indent: 0px; text-tra=
nsform: none; white-space: normal; widows: auto; word-spacing: 0px; -webk=
it-text-stroke-width: 0px;=22><div>Would it be possible in the future to =
have Curator have the option to run a checkExists() before the .start() c=
all on a recipe like Shared-Value=3F Is the extra overhead not worth the =
trouble=3F</div></div><br class=3D=22Apple-interchange-newline=22></div><=
/span></blockquote></body></html>
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