redis crashes while executing SAVE command

[Vandan Joshi]

I am using redis since last couple of years.
Its working fine in RHEL-5, RHEL-6 but it crashes in RHEL-7 while executing SAVE command.
Below is my working environment.

System: Red Hat Enterprise Linux Server release 7.4 (Maipo)
Kernel: 3.10.0-693.el7.x86_64
GCC version: gcc version 4.8.5 20150623 (Red Hat 4.8.5-16) (GCC)
Redis: redis-2.8.3

I have attached the full core file with this post.

I have GDB output as below.
=======================================================================================================================
#0  lzf_compress (in_data=in_data@entry=0x7f4996c8f3bb, in_len=in_len@entry=47, out_data=out_data@entry=0x7f4996c1c5d0, out_len=out_len@entry=43)
    at lzf_c.c:146
        hslot = 0x7ffea25902c4
        htab = <error reading variable htab (Cannot access memory at address 0x7ffea258e8a0)>
        ip = 0x7f4996c8f3bc "MAX:V1H:01:Dashboard:1523968950:SwitchAttempts"
        op = 0x7f4996c1c5d2 ""
        in_end = 0x7f4996c8f3ea ""
        out_end = 0x7f4996c1c5fb ""
        ref = <optimized out>
        off = <optimized out>
        hval = 1229799768
        lit = 1
#1  0x00000000004478eb in rdbSaveLzfStringObject (rdb=rdb@entry=0x7ffea25cea60,
    s=s@entry=0x7f4996c8f3bb "IMAX:V1H:01:Dashboard:1523968950:SwitchAttempts", len=len@entry=47) at rdb.c:319
        comprlen = <optimized out>
        outlen = 43
        out = 0x7f4996c1c5d0
        nwritten = <optimized out>
#2  0x0000000000447c9e in rdbSaveRawString (rdb=0x7ffea25cea60, s=0x7f4996c8f3bb "IMAX:V1H:01:Dashboard:1523968950:SwitchAttempts", len=47)
    at rdb.c:391
        enclen = <optimized out>
        n = <optimized out>
        nwritten = 0
#3  0x000000000044901e in rdbSaveKeyValuePair (rdb=rdb@entry=0x7ffea25cea60, key=key@entry=0x7ffea25cea00, val=val@entry=0x7f4996c351e0,
    expiretime=1523992352247, now=now@entry=1523968965691) at rdb.c:823
No locals.
#4  0x000000000044955c in rdbSaveRio (rdb=rdb@entry=0x7ffea25cea60, error=error@entry=0x7ffea25cea5c, flags=flags@entry=0, rsi=rsi@entry=0x0)
    at rdb.c:934
        keystr = <optimized out>
        key = {type = 0, encoding = 0, lru = 0, refcount = 1, ptr = 0x7f4996c8f3bb}
        o = 0x7f4996c351e0
        expire = <optimized out>
        db = 0x7f4996d4f000
        d = <optimized out>
        db_size = <optimized out>
---Type <return> to continue, or q <return> to quit---
        expires_size = <optimized out>
        di = 0x7f4996c1c5a0
        de = <optimized out>
        magic = "REDIS0008"
        j = 0
        now = 1523968965691
        cksum = 4294967296
        processed = 0
#5  0x00000000004499e8 in rdbSave (filename=0x7f4996c17000 "dump.rdb", rsi=0x0) at rdb.c:1028
        tmpfile = "temp-6749.rdb\000\000\000\020\000\000\000\000\000\000\000\002", '\000' <repeats 15 times>, "\274\236{\235I\177\000\000\000\000\000\000\000\000\000\000\005ă\235I\177\000\000\177\003\000\000\000\000\000\000\377\377\377\377\377\377\377\377\300\351\\\242\376\177\000\000\000\000\000\000\000\000\000\000\272\354\\\242\376\177\000\000\000\020\000\000\000\000\000\000\001\000\000\000\000\000\000\000\000PȖI\177\000\000\020\363ȖI\177\000\000\367,C\000\000\000\000\000/proc/6749/stat\000\220\361\\\242\376\177\000\000\200\361\\\242\376\177\000\000\200LO\000\000\000\000\000\b\000\000\000\000\000\000\000XLO\000\000\000\000\000\211\"|"...
        cwd = "\001\000\000\000\000\000\000\000\020\354\\\242\376\177", '\000' <repeats 11 times>, "\355\\\242\376\177\000\000\210\071|\235I\177\000\000////////\002", '\000' <repeats 15 times>, "\370\377\377\377\377\377\377\377\000\000\000\000\n\000\000\000P\003e\001\000\000\000\000\002\000\000\000\000\000\000\000 \002\000\000\000\000\000\000\000\000\000\000I\177", '\000' <repeats 18 times>, "@\361\\\242\376\177\000\000\000\000\000\000\000\000\000\000\066\067\064\071 (redis-server) R 1 6749 6749 0 -1 4202816 402 0 0 0"...
        fp = 0x1447460
        rdb = {read = 0x47aaf0 <rioFileRead>, write = 0x47ab10 <rioFileWrite>, tell = 0x47aae0 <rioFileTell>, flush = 0x47aac0 <rioFileFlush>,
          update_cksum = 0x47aff0 <rioGenericUpdateChecksum>, cksum = 8233767897234857521, processed_bytes = 98, max_processing_chunk = 0, io = {
            buffer = {ptr = 0x1447460 "\204,\255", <incomplete sequence \373>, pos = 98}, file = {fp = 0x1447460, buffered = 98, autosync = 0},
            fdset = {fds = 0x1447460, state = 0x62, numfds = 0, pos = 0, buf = 0x0}}}
        error = 0
#6  0x000000000044bf8f in saveCommand (c=0x7f4996d61600) at rdb.c:2006
        rsi = {repl_stream_db = -1, repl_id_is_set = 0, repl_id = '0' <repeats 30 times>, "\000\000\000\000\000\000\000\000\000\000",
          repl_offset = -1}
        rsiptr = <optimized out>
#7  0x000000000042c03e in call (c=c@entry=0x7f4996d61600, flags=flags@entry=15) at server.c:2229
        dirty = 4
        start = 139954038621648
        duration = <optimized out>
        client_old_flags = 0
        prev_also_propagate = {ops = 0x0, numops = 0}
#8  0x000000000042c6e7 in processCommand (c=0x7f4996d61600) at server.c:2510
=======================================================================================================================

[Itamar Haber]

Hello Vandan,

This may be a known issue, but v2.8 has long been left untouched in favor of newer versions. I recommend that you upgrade.

Cheers,

--
You received this message because you are subscribed to the Google Groups "Redis DB" group.
To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+unsubscribe@googlegroups.com.
To post to this group, send email to redi...@googlegroups.com.
Visit this group at https://groups.google.com/group/redis-db.
For more options, visit https://groups.google.com/d/optout.

--

Itamar Haber | Technology Evangelist
Redis Labs ~/redis

Mobile: +972 (54) 567 9692
Twitter: @itamarhaber
Skype: itamar.haber

[Vandan Joshi]

Hi, Itamar,

I tried the redis 4.0 too, but it has the same issue.

thanx for the reply.

Vandan D. Joshi
Software Engineer,

Research & Development,
Panamax Infotech Limited,
Ahmedabad - 380052,

Gujarat, India

M : +91 96876 80566

[Itamar Haber]

Hi Vandan,

Since the issue persists w/ v4, I recommend that you open an issue that includes all the details (log, dump, gdb output) at the repo: https://github.com/antirez/redis/issues

Cheers.

[Salvatore Sanfilippo]

Please could you try to enlarge the stack size of Linux before running Redis? Like running "ulimit -s unlimited". 

Then execute Redis and see if it works.

Cheers,

Salvatore

To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+u...@googlegroups.com.

To post to this group, send email to redi...@googlegroups.com.
Visit this group at https://groups.google.com/group/redis-db.
For more options, visit https://groups.google.com/d/optout.

--

Itamar Haber | Technology Evangelist
Redis Labs ~/redis

Mobile: +972 (54) 567 9692
Twitter: @itamarhaber
Skype: itamar.haber

--
You received this message because you are subscribed to the Google Groups "Redis DB" group.

To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+u...@googlegroups.com.

To post to this group, send email to redi...@googlegroups.com.
Visit this group at https://groups.google.com/group/redis-db.
For more options, visit https://groups.google.com/d/optout.

--

Vandan D. Joshi
Software Engineer,

Research & Development,
Panamax Infotech Limited,
Ahmedabad - 380052,

Gujarat, India

M : +91 96876 80566

--
You received this message because you are subscribed to the Google Groups "Redis DB" group.

To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+u...@googlegroups.com.

To post to this group, send email to redi...@googlegroups.com.
Visit this group at https://groups.google.com/group/redis-db.
For more options, visit https://groups.google.com/d/optout.

--

Itamar Haber | Technology Evangelist
Redis Labs ~/redis

Mobile: +972 (54) 567 9692
Twitter: @itamarhaber
Skype: itamar.haber

--
You received this message because you are subscribed to the Google Groups "Redis DB" group.

To unsubscribe from this group and stop receiving emails from it, send an email to redis-db+u...@googlegroups.com.