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  1. Realm Kotlin
  2. RKOTLIN-1103

Multiple sync agents attempted to join the same session

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      How frequently does the bug occur?

      Sometimes

      Description

      Recently we've migrated from realm-java to realm-kotlin 1.16.0 and I see new kind of crashes.

      Google reports it like this:
      terminating with uncaught exception of type realm::MultipleSyncAgents: Multiple sync agents attempted to join the same session

      I've found link to unstripped symbols, uploaded them to our sentry and now we have symbolicated version. See below. As I understand error is thrown during operation processing, but due to rethrow code we can't see exact line where original exception was thrown.

      MultipleSyncAgents error means that second session tries to open database that is already sync_agent_present = true. https://github.com/realm/realm-core/blob/970c4fd89f3c9b18ffd26f075534992e2fd8fa51/src/realm/db.cpp#L2865

      Could you suggest how is that could be triggered from realm-kotlin?

      Stacktrace & log output

      Unable to find source-code formatter for language: shell. Available languages are: actionscript, ada, applescript, bash, c, c#, c++, cpp, css, erlang, go, groovy, haskell, html, java, javascript, js, json, lua, none, nyan, objc, perl, php, python, r, rainbow, ruby, scala, sh, sql, swift, visualbasic, xml, yaml
      Stacktrace from google: 

*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
pid: 0, tid: 7805 >>> com.bodunov.galileo <<<

backtrace:
  #00  pc 0x0000000000059b38  /apex/com.android.runtime/lib64/bionic/libc.so (abort+164)
  #01  pc 0x0000000000aef678  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #02  pc 0x0000000000aef864  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #03  pc 0x0000000000aef714  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #04  pc 0x0000000000aef028  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #05  pc 0x00000000005fe350  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #06  pc 0x000000000060a58c  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #07  pc 0x00000000005fd4c0  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #08  pc 0x00000000005fed50  /data/app/~~K5jmEVKJv42XkpX30VJ_TA==/com.bodunov.galileo-VYzAnIAl9IYd_ZIr0Yjw7g==/split_config.arm64_v8a.apk!librealmc.so (BuildId: 078c57fb26200dce4219f8a2d6c74f27511a0462)
  #09  pc 0x00000000000be888  /apex/com.android.runtime/lib64/bionic/libc.so (__pthread_start(void*)+208)
  #10  pc 0x000000000005b370  /apex/com.android.runtime/lib64/bionic/libc.so (__start_thread+64)

      stacktrace from sentry:

      OS Version: Android 12 (GM1900_11_H.41)
Report Version: 104

Exception Type: Unknown (SIGABRT)

Application Specific Information:
Abort

Thread 0 Crashed:
0   libc.so                         0x7d414b99c8        abort
1   split_config.arm64_v8a.apk      0x7c20b17678        abort_message (abort_message.cpp:76)
2   split_config.arm64_v8a.apk      0x7c20b17864        demangling_terminate_handler (cxa_default_handlers.cpp:62)
3   split_config.arm64_v8a.apk      0x7c20b17714        std::__terminate (cxa_handlers.cpp:59)
4   split_config.arm64_v8a.apk      0x7c20b17028        __cxa_rethrow (cxa_exception.cpp:616)
5   split_config.arm64_v8a.apk      0x7c20626350        realm::sync::network::Service::PostOper<T>::recycle_and_execute (network.hpp:2025)
6   split_config.arm64_v8a.apk      0x7c2063258c        [inlined] realm::sync::network::Service::Impl::execute (network.cpp:1646)
7   split_config.arm64_v8a.apk      0x7c2063258c        realm::sync::network::Service::Impl::run_impl (network.cpp:1574)
8   split_config.arm64_v8a.apk      0x7c206254c0        realm::sync::websocket::DefaultSocketProvider::event_loop (default_socket.cpp:615)
9   split_config.arm64_v8a.apk      0x7c20626d50        [inlined] std::__ndk1::__invoke<T> (type_traits:3815)
10  split_config.arm64_v8a.apk      0x7c20626d50        [inlined] std::__ndk1::__thread_execute<T> (thread:273)
11  split_config.arm64_v8a.apk      0x7c20626d50        std::__ndk1::__thread_proxy<T> (thread:284)
12  libc.so                         0x7d4151eb44        <unknown> + 537966799684
13  libc.so                         0x7d414bb2fc        <unknown> + 537966392060
EOF

      ```

      Can you reproduce the bug?

      – select –

      Reproduction Steps

      Unfortunately I have to reproduction steps. I need your assistance with that.

      Version

      1.16.0

      What Atlas App Services are you using?

      Atlas Device Sync

      Are you using encryption?

      No

      Platform OS and version(s)

      Android 10 - Android 14

      Build environment

      Android Studio version: Jellyfish | 2023.3.1
      Android Build Tools version: 34.0.0
      Gradle version: 8.6

            Assignee:
            Unassigned Unassigned
            Reporter:
            unitosyncbot Unito Sync Bot
            Votes:
            0 Vote for this issue
            Watchers:
            2 Start watching this issue

              Created:
              Updated: