Thanks for reporting this issue Mark. I'm pulling Klou into this conversation who knows more about the StreamingFileSink. @Klou does the StreamingFileSink relies on DeleteOnExitHooks to clean up files?
Cheers, Till On Tue, Jan 21, 2020 at 3:38 PM Mark Harris <mark.har...@hivehome.com> wrote: > Hi, > > We're using flink 1.7.2 on an EMR cluster v emr-5.22.0, which runs hadoop > v "Amazon 2.8.5". We've recently noticed that some TaskManagers fail > (causing all the jobs running on them to fail) with an > "java.lang.OutOfMemoryError: GC overhead limit exceeded”. The taskmanager > (and jobs that should be running on it) remain down until manually > restarted. > > I managed to take and analyze a memory dump from one of the afflicted > taskmanagers. > > It showed that 85% of the heap was made up of > the java.io.DeleteOnExitHook.files hashset. The majority of the strings in > that hashset (9041060 out of ~9041100) pointed to files that began > /tmp/hadoop-yarn/s3a/s3ablock > > The problem seems to affect jobs that make use of the StreamingFileSink - > all of the taskmanager crashes have been on the taskmaster running at least > one job using this sink, and a cluster running only a single taskmanager / > job that uses the StreamingFileSink crashed with the GC overhead limit > exceeded error. > > I've had a look for advice on handling this error more broadly without > luck. > > Any suggestions or advice gratefully received. > > Best regards, > > Mark Harris > > > > The information contained in or attached to this email is intended only > for the use of the individual or entity to which it is addressed. If you > are not the intended recipient, or a person responsible for delivering it > to the intended recipient, you are not authorised to and must not disclose, > copy, distribute, or retain this message or any part of it. It may contain > information which is confidential and/or covered by legal professional or > other privilege under applicable law. > > The views expressed in this email are not necessarily the views of > Centrica plc or its subsidiaries, and the company, its directors, officers > or employees make no representation or accept any liability for its > accuracy or completeness unless expressly stated to the contrary. > > Additional regulatory disclosures may be found here: > https://www.centrica.com/privacy-cookies-and-legal-disclaimer#email > > PH Jones is a trading name of British Gas Social Housing Limited. British > Gas Social Housing Limited (company no: 01026007), British Gas Trading > Limited (company no: 03078711), British Gas Services Limited (company no: > 3141243), British Gas Insurance Limited (company no: 06608316), British Gas > New Heating Limited (company no: 06723244), British Gas Services > (Commercial) Limited (company no: 07385984) and Centrica Energy (Trading) > Limited (company no: 02877397) are all wholly owned subsidiaries of > Centrica plc (company no: 3033654). Each company is registered in England > and Wales with a registered office at Millstream, Maidenhead Road, Windsor, > Berkshire SL4 5GD. > > British Gas Insurance Limited is authorised by the Prudential Regulation > Authority and regulated by the Financial Conduct Authority and the > Prudential Regulation Authority. British Gas Services Limited and Centrica > Energy (Trading) Limited are authorised and regulated by the Financial > Conduct Authority. British Gas Trading Limited is an appointed > representative of British Gas Services Limited which is authorised and > regulated by the Financial Conduct Authority. >
