Details
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Bug
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Status: Closed
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Test Blocker
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Resolution: Fixed
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6.5.0, 6.0.4
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Enterprise Edition 6.5.0 build 4947
Description
Install couchbase sever on OEL8
OEL8 Box -
[root@changeme logs]# cat /etc/oracle-release
Oracle Linux Server release 8.1
Attachments
Activity
By strace'ing the beam.smp process which was running at ~100% CPU I see a number of read syscalls failing with EOPNOTSUPP - as per the ns_heart error seen in the logs:
$ strace -p 76463 -f -e trace=%desc |
...
|
76469 openat(AT_FDCWD, "/proc/pressure/cpu", O_RDONLY) = 47 |
76469 fstat(47, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
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76469 read(47, 0x7f8dea68b6c8, 16384) = -1 EOPNOTSUPP (Operation not supported) |
76469 close(47)
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...
|
It appears that something is preventing ns_heart from reading from the /proc file /proc/pressure/cpu.
From https://patchwork.ozlabs.org/patch/1031852/, it appears that those files can be present, but unreadable if CONFIG_PSI_DEFAULT_DISABLED is set:
Kernel v4.20 added /proc/pressure/
Unknown macro: {cpu,io,memory}, when enabled
CONFIG_PSI ("Pressure stall information tracking").
When CONFIG_PSI_DEFAULT_DISABLED is also enabled (and psi=1 kernel
parameter is not set) these files are created, but not readable.Signed-off-by: Petr Vorel <pvorel@suse.cz>
—
testcases/kernel/fs/proc/proc01.c | 1 +1 file changed, 1 insertion(+)diff --git a/testcases/kernel/fs/proc/proc01.c b/testcases/kernel/fs/proc/proc01.cindex c886e7e85..d917591bf 100644--- a/testcases/kernel/fs/proc/proc01.c+++ b/testcases/kernel/fs/proc/proc01.c@@ -111,6 +111,7 @@ static const struct mapping known_issues[] = {{"read", "/proc/sys/vm/nr_hugepages", EOPNOTSUPP},{"read", "/proc/sys/vm/nr_overcommit_hugepages", EOPNOTSUPP},{"read", "/proc/sys/vm/nr_hugepages_mempolicy", EOPNOTSUPP},+ {"read", "/proc/pressure/*", EOPNOTSUPP},{"", "", 0}
I believe that EOPNOTSUPP needs to be handled as possible error code in this path.
Build couchbase-server-6.0.4-3044 contains ns_server commit 4006df2 with commit message:
MB-37273 Report errors uniformly in misc:raw_read_file().
Build couchbase-server-7.0.0-1135 contains ns_server commit 4006df2 with commit message:
MB-37273 Report errors uniformly in misc:raw_read_file().
Build couchbase-server-6.5.0-4952 contains ns_server commit 4006df2 with commit message:
MB-37273 Report errors uniformly in misc:raw_read_file().
Build couchbase-server-6.5.1-6016 contains ns_server commit 4006df2 with commit message:
MB-37273 Report errors uniformly in misc:raw_read_file().
Installed CBS 6.5.0-4952 on OEL 8.1 and configured the cluster for one node
[error_logger:error,2019-12-16T00:25:20.166-08:00,ns_1@cb.local:error_logger<0.32.0>:ale_error_logger_handler:do_log:203]** Generic server ns_heart terminating** Last message in was beat** When Server state == {state,undefined,<0.29983.60>,[],0}** Reason for termination ==** {enotsup,[{misc,raw_read_loop,2,[{file,"src/misc.erl"},{line,934}]},{misc,with_file,3,[{file,"src/misc.erl"},{line,1782}]},{ns_heart,'-grab_procfs_files/0-lc$^0/1-0-',1,[{file,"src/ns_heart.erl"},{line,509}]},{ns_heart,'-grab_procfs_files/0-lc$^0/1-0-',1,[{file,"src/ns_heart.erl"},{line,515}]},{ns_heart,current_status_slow_inner,0,[{file,"src/ns_heart.erl"},{line,347}]},{ns_heart,current_status_slow,1,[{file,"src/ns_heart.erl"},{line,250}]},{ns_heart,update_current_status,1,[{file,"src/ns_heart.erl"},{line,187}]},{ns_heart,handle_info,2,[{file,"src/ns_heart.erl"},{line,118}]}]}[ns_server:debug,2019-12-16T00:25:20.166-08:00,ns_1@cb.local:<0.29983.60>:ns_pubsub:do_subscribe_link_continue:152]Parent process of subscription {buckets_events,<0.29982.60>} exited with reason {enotsup,[{misc,raw_read_loop,2,[{file,"src/misc.erl"},{line,934}]},{misc,with_file,3,[{file,"src/misc.erl"},{line,1782}]},{ns_heart,'-grab_procfs_files/0-lc$^0/1-0-',1,[{file,"src/ns_heart.erl"},{line,509}]},{ns_heart,'-grab_procfs_files/0-lc$^0/1-0-',1,[{file,"src/ns_heart.erl"},{line,515}]},{ns_heart,current_status_slow_inner,0,[{file,"src/ns_heart.erl"},{line,347}]},{ns_heart,current_status_slow,1,[{file,"src/ns_heart.erl"},{line,250}]},{ns_heart,update_current_status,1,[{file,"src/ns_heart.erl"},{line,187}]},{ns_heart,handle_info,2,[{file,"src/ns_heart.erl"},{line,118}]}]}[error_logger:error,2019-12-16T00:25:20.167-08:00,ns_1@cb.local:error_logger<0.32.0>:ale_error_logger_handler:do_log:203]=========================CRASH REPORT=========================crasher:initial call: ns_heart:init/1pid: <0.29982.60>registered_name: ns_heartexception error: enotsupin function misc:raw_read_loop/2 (src/misc.erl, line 934)in call from misc:with_file/3 (src/misc.erl, line 1782)in call from ns_heart:'-grab_procfs_files/0-lc$^0/1-0-'/1 (src/ns_heart.erl, line 509)in call from ns_heart:'-grab_procfs_files/0-lc$^0/1-0-'/1 (src/ns_heart.erl, line 515)in call from ns_heart:current_status_slow_inner/0 (src/ns_heart.erl, line 347)in call from ns_heart:current_status_slow/1 (src/ns_heart.erl, line 250)in call from ns_heart:update_current_status/1 (src/ns_heart.erl, line 187)in call from ns_heart:handle_info/2 (src/ns_heart.erl, line 118)ancestors: [ns_heart_sup,ns_server_sup,ns_server_nodes_sup,<0.206.0>,ns_server_cluster_sup,root_sup,<0.118.0>]message_queue_len: 0messages: []links: [<0.29981.60>,<0.29983.60>,<0.293.0>]dictionary: []trap_exit: truestatus: runningheap_size: 6772stack_size: 27reductions: 8403neighbours: