Bug 1785472
Summary: | MDS may assert due to creating too many openfiletable objects | ||
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Product: | [Red Hat Storage] Red Hat Ceph Storage | Reporter: | Patrick Donnelly <pdonnell> |
Component: | CephFS | Assignee: | Yan, Zheng <zyan> |
Status: | CLOSED ERRATA | QA Contact: | subhash <vpoliset> |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | 4.0 | CC: | ceph-eng-bugs, ceph-qe-bugs, hyelloji, kdreyer, sweil, tserlin, zyan |
Target Milestone: | rc | Flags: | hyelloji:
needinfo-
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Target Release: | 4.1 | ||
Hardware: | All | ||
OS: | All | ||
Whiteboard: | |||
Fixed In Version: | ceph-14.2.8-3.el8, ceph-14.2.8-3.el7 | Doc Type: | If docs needed, set a value |
Doc Text: | Story Points: | --- | |
Clone Of: | Environment: | ||
Last Closed: | 2020-05-19 17:31:40 UTC | Type: | Bug |
Regression: | --- | Mount Type: | --- |
Documentation: | --- | CRM: | |
Verified Versions: | Category: | --- | |
oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
Cloudforms Team: | --- | Target Upstream Version: | |
Embargoed: |
Description
Patrick Donnelly
2019-12-20 00:33:29 UTC
Zheng, please address Kens' comment. Steps to Reproduce: 1. git clone upstream ceph source 2. git checkout -b nautilus origin/nautilus 3. git show 4802061055d676fb8b98cb03a3e441b3537acfc0 | patch -p1 -R #revert fix 4. ./do_cmake.sh; cd build; make -j8 # compile ceph 5. ../src/vstart.sh -n # setup vstart cluster 6. edit ./ceph.conf and add 'osd_deep_scrub_large_omap_object_key_threshold = 1000' to mds section 7. killall ceph-mds; bin/ceph-mds -i a # restart mds 8. mount cephfs at /mnt/ceph # must be kernel mount, you can find admin keyring at ./keyring 9. run following python script with sudo #!/bin/python import os import sys import time mnt_path = '/mnt/ceph' ceph_path = os.getcwd() def flush_journal(): os.chdir(ceph_path) os.system('bin/ceph daemon mds.a flush journal') os.chdir(mnt_path) fd = -1 os.chdir(mnt_path) os.system('echo 3 > /proc/sys/vm/drop_caches') while True: fds = [] for i in range(1, 1010): f = os.open("file%d" % i, os.O_CREAT | os.O_RDWR, 0666) fds.append(f) if fd >= 0: os.close(fd) os.system('echo 3 > /proc/sys/vm/drop_caches') time.sleep(10) flush_journal() fd= os.open("file0", os.O_CREAT | os.O_RDWR, 0666) flush_journal() for f in fds: os.close(f) os.system('echo 3 > /proc/sys/vm/drop_caches') time.sleep(10) flush_journal() 9. run 'rados -p cephfs.a.meta ls | grep mds0_openfiles' in another terminal. keep if object count keep increasing (about every 30s) Actual Results: count of 'mds0_openfiles.xxx' objects keeps increasing Expected Results: Above python script only create two mds0_openfiles objects. Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2020:2231 |