@craigweb I am running v3.5.4. Here is one of the log files:

# # There is insufficient memory for the Java Runtime Environment to continue. # Native memory allocation (mmap) failed to map 419430400 bytes for committing reserved memory. # Possible reasons: # The system is out of physical RAM or swap space # In 32 bit mode, the process size limit was hit # Possible solutions: # Reduce memory load on the system # Increase physical memory or swap space # Check if swap backing store is full # Use 64 bit Java on a 64 bit OS # Decrease Java heap size (-Xmx/-Xms) # Decrease number of Java threads # Decrease Java thread stack sizes (-Xss) # Set larger code cache with -XX:ReservedCodeCacheSize= # This output file may be truncated or incomplete. # # Out of Memory Error (os_linux.cpp:2640), pid=303, tid=0xb6185460 # # JRE version: (8.0_181-b13) (build ) # Java VM: Java HotSpot(TM) Server VM (25.181-b13 mixed mode linux-arm ) # Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again # --------------- T H R E A D --------------- Current thread (0xb600b400): JavaThread "Unknown thread" [_thread_in_vm, id=305, stack(0xb6136000,0xb6186000)] Stack: [0xb6136000,0xb6186000] --------------- P R O C E S S --------------- Java Threads: ( => current thread ) Other Threads: =>0xb600b400 (exited) JavaThread "Unknown thread" [_thread_in_vm, id=305, stack(0xb6136000,0xb6186000)] VM state:not at safepoint (not fully initialized) VM Mutex/Monitor currently owned by a thread: None GC Heap History (0 events): No events Deoptimization events (0 events): No events Classes redefined (0 events): No events Internal exceptions (0 events): No events Events (0 events): No events Dynamic libraries: 00008000-00009000 r-xp 00000000 b3:02 29543 /usr/lib/jvm/java-8-oracle/jre/bin/java 00010000-00011000 rw-p 00000000 b3:02 29543 /usr/lib/jvm/java-8-oracle/jre/bin/java 00011000-00032000 rw-p 00000000 00:00 0 [heap] 68ba7000-68dff000 ---p 00000000 00:00 0 68dff000-68e00000 rw-p 00000000 00:00 0 68e00000-9ae00000 ---p 00000000 00:00 0 b3ecd000-b3ed3000 rw-p 00000000 00:00 0 b3ed3000-b3f4d000 ---p 00000000 00:00 0 b3f4d000-b40cd000 rwxp 00000000 00:00 0 b40cd000-b5f4d000 ---p 00000000 00:00 0 b5f4d000-b5f65000 r-xp 00000000 b3:02 31484 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libzip.so b5f65000-b5f6c000 ---p 00018000 b3:02 31484 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libzip.so b5f6c000-b5f6d000 rw-p 00017000 b3:02 31484 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libzip.so b5f6d000-b5f75000 r-xp 00000000 b3:02 33791 /lib/arm-linux-gnueabihf/libnss_files-2.19.so b5f75000-b5f84000 ---p 00008000 b3:02 33791 /lib/arm-linux-gnueabihf/libnss_files-2.19.so b5f84000-b5f85000 r--p 00007000 b3:02 33791 /lib/arm-linux-gnueabihf/libnss_files-2.19.so b5f85000-b5f86000 rw-p 00008000 b3:02 33791 /lib/arm-linux-gnueabihf/libnss_files-2.19.so b5f86000-b5f8d000 r-xp 00000000 b3:02 33793 /lib/arm-linux-gnueabihf/libnss_nis-2.19.so b5f8d000-b5f9c000 ---p 00007000 b3:02 33793 /lib/arm-linux-gnueabihf/libnss_nis-2.19.so b5f9c000-b5f9d000 r--p 00006000 b3:02 33793 /lib/arm-linux-gnueabihf/libnss_nis-2.19.so b5f9d000-b5f9e000 rw-p 00007000 b3:02 33793 /lib/arm-linux-gnueabihf/libnss_nis-2.19.so b5f9e000-b5fab000 r-xp 00000000 b3:02 33788 /lib/arm-linux-gnueabihf/libnsl-2.19.so b5fab000-b5fba000 ---p 0000d000 b3:02 33788 /lib/arm-linux-gnueabihf/libnsl-2.19.so b5fba000-b5fbb000 r--p 0000c000 b3:02 33788 /lib/arm-linux-gnueabihf/libnsl-2.19.so b5fbb000-b5fbc000 rw-p 0000d000 b3:02 33788 /lib/arm-linux-gnueabihf/libnsl-2.19.so b5fbc000-b5fbe000 rw-p 00000000 00:00 0 b5fbe000-b5fc3000 r-xp 00000000 b3:02 33789 /lib/arm-linux-gnueabihf/libnss_compat-2.19.so b5fc3000-b5fd2000 ---p 00005000 b3:02 33789 /lib/arm-linux-gnueabihf/libnss_compat-2.19.so b5fd2000-b5fd3000 r--p 00004000 b3:02 33789 /lib/arm-linux-gnueabihf/libnss_compat-2.19.so b5fd3000-b5fd4000 rw-p 00005000 b3:02 33789 /lib/arm-linux-gnueabihf/libnss_compat-2.19.so b5fd4000-b5ff7000 r-xp 00000000 b3:02 31468 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libjava.so b5ff7000-b5fff000 ---p 00023000 b3:02 31468 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libjava.so b5fff000-b6000000 rw-p 00023000 b3:02 31468 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libjava.so b6000000-b6021000 rw-p 00000000 00:00 0 b6021000-b6100000 ---p 00000000 00:00 0 b6106000-b610e000 rw-s 00000000 00:1c 49710282 /tmp/hsperfdata_mango/303 b610e000-b6117000 r-xp 00000000 b3:02 31489 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libverify.so b6117000-b611f000 ---p 00009000 b3:02 31489 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libverify.so b611f000-b6120000 rw-p 00009000 b3:02 31489 /usr/lib/jvm/java-8-oracle/jre/lib/arm/libverify.so b6120000-b6125000 r-xp 00000000 b3:02 33797 /lib/arm-linux-gnueabihf/librt-2.19.so b6125000-b6134000 ---p 00005000 b3:02 33797 /lib/arm-linux-gnueabihf/librt-2.19.so b6134000-b6135000 r--p 00004000 b3:02 33797 /lib/arm-linux-gnueabihf/librt-2.19.so b6135000-b6136000 rw-p 00005000 b3:02 33797 /lib/arm-linux-gnueabihf/librt-2.19.so b6136000-b6139000 ---p 00000000 00:00 0 b6139000-b6186000 rw-p 00000000 00:00 0 [stack:305] b6186000-b61e9000 r-xp 00000000 b3:02 33786 /lib/arm-linux-gnueabihf/libm-2.19.so b61e9000-b61f8000 ---p 00063000 b3:02 33786 /lib/arm-linux-gnueabihf/libm-2.19.so b61f8000-b61f9000 r--p 00062000 b3:02 33786 /lib/arm-linux-gnueabihf/libm-2.19.so b61f9000-b61fa000 rw-p 00063000 b3:02 33786 /lib/arm-linux-gnueabihf/libm-2.19.so b61fa000-b69a4000 r-xp 00000000 b3:02 31497 /usr/lib/jvm/java-8-oracle/jre/lib/arm/server/libjvm.so b69a4000-b69ab000 ---p 007aa000 b3:02 31497 /usr/lib/jvm/java-8-oracle/jre/lib/arm/server/libjvm.so b69ab000-b6a01000 rw-p 007a9000 b3:02 31497 /usr/lib/jvm/java-8-oracle/jre/lib/arm/server/libjvm.so b6a01000-b6e2a000 rw-p 00000000 00:00 0 b6e2a000-b6e43000 r-xp 00000000 b3:02 1151 /lib/arm-linux-gnueabihf/libgcc_s.so.1 b6e43000-b6e52000 ---p 00019000 b3:02 1151 /lib/arm-linux-gnueabihf/libgcc_s.so.1 b6e52000-b6e53000 rw-p 00018000 b3:02 1151 /lib/arm-linux-gnueabihf/libgcc_s.so.1 b6e53000-b6f2e000 r-xp 00000000 b3:02 33782 /lib/arm-linux-gnueabihf/libc-2.19.so b6f2e000-b6f3d000 ---p 000db000 b3:02 33782 /lib/arm-linux-gnueabihf/libc-2.19.so b6f3d000-b6f3f000 r--p 000da000 b3:02 33782 /lib/arm-linux-gnueabihf/libc-2.19.so b6f3f000-b6f40000 rw-p 000dc000 b3:02 33782 /lib/arm-linux-gnueabihf/libc-2.19.so b6f40000-b6f43000 rw-p 00000000 00:00 0 b6f43000-b6f45000 r-xp 00000000 b3:02 33785 /lib/arm-linux-gnueabihf/libdl-2.19.so b6f45000-b6f54000 ---p 00002000 b3:02 33785 /lib/arm-linux-gnueabihf/libdl-2.19.so b6f54000-b6f55000 r--p 00001000 b3:02 33785 /lib/arm-linux-gnueabihf/libdl-2.19.so b6f55000-b6f56000 rw-p 00002000 b3:02 33785 /lib/arm-linux-gnueabihf/libdl-2.19.so b6f56000-b6f6b000 r-xp 00000000 b3:02 31492 /usr/lib/jvm/java-8-oracle/jre/lib/arm/jli/libjli.so b6f6b000-b6f72000 ---p 00015000 b3:02 31492 /usr/lib/jvm/java-8-oracle/jre/lib/arm/jli/libjli.so b6f72000-b6f73000 rw-p 00014000 b3:02 31492 /usr/lib/jvm/java-8-oracle/jre/lib/arm/jli/libjli.so b6f73000-b6f83000 r-xp 00000000 b3:02 33778 /lib/arm-linux-gnueabihf/libpthread-2.19.so b6f83000-b6f92000 ---p 00010000 b3:02 33778 /lib/arm-linux-gnueabihf/libpthread-2.19.so b6f92000-b6f93000 r--p 0000f000 b3:02 33778 /lib/arm-linux-gnueabihf/libpthread-2.19.so b6f93000-b6f94000 rw-p 00010000 b3:02 33778 /lib/arm-linux-gnueabihf/libpthread-2.19.so b6f94000-b6f96000 rw-p 00000000 00:00 0 b6f96000-b6fad000 r-xp 00000000 b3:02 33779 /lib/arm-linux-gnueabihf/ld-2.19.so b6fb2000-b6fb5000 rw-p 00000000 00:00 0 b6fb9000-b6fba000 r--p 00000000 00:00 0 b6fba000-b6fbc000 rw-p 00000000 00:00 0 b6fbc000-b6fbd000 r-xp 00000000 00:00 0 [sigpage] b6fbd000-b6fbe000 r--p 00017000 b3:02 33779 /lib/arm-linux-gnueabihf/ld-2.19.so b6fbe000-b6fbf000 rw-p 00018000 b3:02 33779 /lib/arm-linux-gnueabihf/ld-2.19.so bed24000-bed45000 rw-p 00000000 00:00 0 [stack] ffff0000-ffff1000 r-xp 00000000 00:00 0 [vectors] VM Arguments: jvm_args: -Xms1200m -Xmx1200m -Dma.home=/opt/mango -Djava.library.path=/opt/mango/overrides/lib:/opt/mango/lib:/usr/lib/jni/:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games java_command: com.serotonin.m2m2.Main java_class_path (initial): /opt/mango/overrides/classes:/opt/mango/classes:/opt/mango/overrides/properties:/opt/mango/overrides/lib/*:/opt/mango/lib/ma-priv-3.5.4.jar:/opt/mango/lib/guava-24.1.1-jre.jar:/opt/mango/lib/rql-parser-0.3.2.jar:/opt/mango/lib/mail-1.5.0-b01.jar:/opt/mango/lib/websocket-common-9.4.12.v20180830.jar:/opt/mango/lib/swagger-models-1.5.20.jar:/opt/mango/lib/annotations-2.0.1.jar:/opt/mango/lib/javolution-5.2.3.jar:/opt/mango/lib/spring-tx-5.0.10.RELEASE.jar:/opt/mango/lib/spring-websocket-5.0.10.RELEASE.jar:/opt/mango/lib/asm-6.2.jar:/opt/mango/lib/websocket-client-9.4.12.v20180830.jar:/opt/mango/lib/spring-expression-5.0.10.RELEASE.jar:/opt/mango/lib/jetty-util-ajax-9.4.12.v20180830.jar:/opt/mango/lib/jackson-databind-2.9.5.jar:/opt/mango/lib/jackson-datatype-jsr310-2.9.5.jar:/opt/mango/lib/springfox-spi-2.9.2.jar:/opt/mango/lib/commons-beanutils-1.8.3.jar:/opt/mango/lib/poi-3.17.jar:/opt/mango/lib/spring-web-5.0.10.RELEASE.jar:/opt/mango/lib/commons-codec-1.6.jar:/opt/mango/lib/passay-1.3.1.jar:/opt/mango/lib/jetty-plus-9.4.12.v20180830.jar:/opt/mango/lib/xmlbeans-2.6.0.jar:/opt/mango/lib/mapstruct-1.2.0.Final.jar:/opt/mango/lib/jetty-schemas-3.1.jar:/opt/mango/lib/caffeine-2.6.2.jar:/opt/mango/lib/log4j-core-2.10.0.jar:/opt/mango/lib/spring-security-config-5.0.9.RELEASE.jar:/opt/mango/lib/joda-time-2.9.9.jar:/opt/mango/lib/jjwt-0.9.0.jar:/opt/mango/lib/JLargeArrays-1.5.jar:/opt/mango/lib/springfox-swagger-ui-2.9.2.jar:/opt/mango/lib/log-1.0.jar:/opt/mango/lib/jackson-dataformat-csv-2.9.5.jar:/opt/mango/lib/commons-digester-1.6.jar:/opt/mango/lib/poi-ooxml-schemas-3.17.jar:/opt/mango/lib/apache-jsp-8.5.24.2.jar:/opt/mango/lib/jetty-io-9.4.12.v20180830.jar:/opt/mango/lib/stax-api-1.0.1.jar:/opt/mango/lib/jetty-webapp-9.4.12.v20180830.jar:/opt/mango/lib/junit-3.8.1.jar:/opt/mango/lib/jetty-xml-9.4.12.v20180830.jar:/opt/mango/lib/animal-sniffer-annotations-1.14.jar:/opt/mango/lib/postgresql-9.2-1002-jdbc4.jar:/opt/mango/lib/http2-common-9.4.12 Launcher Type: SUN_STANDARD Environment Variables: PATH=/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games SHELL=/bin/bash Signal Handlers: SIGSEGV: [libjvm.so+0x71c154], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGBUS: [libjvm.so+0x71c154], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGFPE: [libjvm.so+0x5abb24], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGPIPE: [libjvm.so+0x5abb24], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGXFSZ: [libjvm.so+0x5abb24], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGILL: [libjvm.so+0x5abb24], sa_mask[0]=11111111011111111101111111111110, sa_flags=SA_RESTART|SA_SIGINFO SIGUSR1: SIG_DFL, sa_mask[0]=00000000000000000000000000000000, sa_flags=none SIGUSR2: [libjvm.so+0x5abc88], sa_mask[0]=00000000000000000000000000000000, sa_flags=SA_RESTART|SA_SIGINFO SIGHUP: SIG_DFL, sa_mask[0]=00000000000000000000000000000000, sa_flags=none SIGINT: SIG_IGN, sa_mask[0]=00000000000000000000000000000000, sa_flags=none SIGTERM: SIG_DFL, sa_mask[0]=00000000000000000000000000000000, sa_flags=none SIGQUIT: SIG_IGN, sa_mask[0]=00000000000000000000000000000000, sa_flags=none --------------- S Y S T E M --------------- OS:PRETTY_NAME="Debian GNU/Linux 8 (jessie)" NAME="Debian GNU/Linux" VERSION_ID="8" VERSION="8 (jessie)" ID=debian HOME_URL="http://www.debian.org/" SUPPORT_URL="http://www.debian.org/support" BUG_REPORT_URL="https://bugs.debian.org/" uname:Linux 3.10.82+ #1 SMP PREEMPT Mon Sep 7 16:31:39 MDT 2015 armv7l libc:glibc 2.19 NPTL 2.19 rlimit: STACK 8192k, CORE 0k, NPROC 11925, NOFILE 65536, AS infinity load average:3.59 3.70 6.75 /proc/meminfo: MemTotal: 2038840 kB MemFree: 173480 kB Buffers: 1292 kB Cached: 140968 kB SwapCached: 0 kB Active: 1523832 kB Inactive: 128008 kB Active(anon): 1515268 kB Inactive(anon): 119368 kB Active(file): 8564 kB Inactive(file): 8640 kB Unevictable: 0 kB Mlocked: 0 kB HighTotal: 1296384 kB HighFree: 5084 kB LowTotal: 742456 kB LowFree: 168396 kB SwapTotal: 0 kB SwapFree: 0 kB Dirty: 4756 kB Writeback: 0 kB AnonPages: 1509680 kB Mapped: 12268 kB Shmem: 125052 kB Slab: 45344 kB SReclaimable: 23404 kB SUnreclaim: 21940 kB KernelStack: 1672 kB PageTables: 3632 kB NFS_Unstable: 0 kB Bounce: 0 kB WritebackTmp: 0 kB CommitLimit: 1019420 kB Committed_AS: 1600740 kB VmallocTotal: 245760 kB VmallocUsed: 18812 kB VmallocChunk: 103580 kB CPU:total 8 (initial active 8) (ARMv7), vfp, vfp3-32, simd /proc/cpuinfo: processor : 0 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 84.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 3 processor : 1 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 84.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 3 processor : 2 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 84.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 3 processor : 3 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 84.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x0 CPU part : 0xc07 CPU revision : 3 processor : 4 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 54.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc0f CPU revision : 3 processor : 5 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 54.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc0f CPU revision : 3 processor : 6 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 54.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc0f CPU revision : 3 processor : 7 model name : ARMv7 Processor rev 3 (v7l) BogoMIPS : 54.00 Features : swp half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt CPU implementer : 0x41 CPU architecture: 7 CPU variant : 0x2 CPU part : 0xc0f CPU revision : 3 Hardware : ODROID-XU3 Revision : 0100 Serial : 0000000000000000 Memory: 4k page, physical 2038840k(173480k free), swap 0k(0k free) vm_info: Java HotSpot(TM) Server VM (25.181-b13) for linux-arm-vfp-hflt JRE (1.8.0_181-b13), built on Jul 7 2018 01:31:41 by "java_re" with gcc 4.7.2 20120910 (prerelease) time: Wed Aug 19 13:36:29 2020 elapsed time: 0 seconds (0d 0h 0m 0s)

Any idea why is java crashing?

Thanks.

@sky_watcher there is no limit to the number of users on a system. Those recommendations are according to the hardware specs. Each concurrent user uses up some server resources, the more powerful your server the more concurrent users you can safely have.

@mattfox got it! Thanks a lot, man!

Hi sky_watcher,

@cwangv is correct that Mango does not expose options to operate as a BBMD, and you did say it's a MangoES so that applies. But this is the BACnet4J section of the forum, so I must mention there is code to do this in BACnet4J. Notice the bbmdEnabled variable in LocalDevice,

ok, Thank you a lot!

I used that function because it will give a java.util.List which we could addAll to the other list acquired the same way. You could also use the lastValue function, as described in the JavaScript help, or simply use the .value and .time from the point (which actually wouldn't work quite right here because we need to go through the text renderer, and a .value is a primitive data type usually instead of a DataValue object.

When it is recommended to move from MangoES box to a powerful PC?

When you expect the load on the server to exceed what you find the ES to be capable of. From https://en.wikipedia.org/wiki/ODROID#Specifications for the XU4,

CPU: Exynos 5422 Octa big.LITTLE ARM Cortex-A15 @ 2.0 GHz quad-core and Cortex-A7 quad-core CPUs Memory: 2 GB LPDDR3 RAM at 933 MHz (14.9 GB/s memory bandwidth) PoP stacked

This could be because

You have several users opening analytical type dashboards at the same times (where they're just requesting graph after graph while using it). You have a very complex control algorithm / predictive analytics You need to run large reports

Past that, an ES, having less computing power than the prospective powerful computer, would be less forgiving with inefficiencies created in configuration, like

Not using Websockets or the AngularJS dashboarding tools and directives for dashboards. Inefficient meta or scripting data source scripts.

To the root of the question, we usually would recommend adding another Mango (perhaps in the cloud) and then move the analytics and display responsibility onto that instance (so, publish all the data from the ES). Then the ES is certainly able to handle thousands of data points. It divides the user access for better distribution of the responsibilities of the system (leaving control unburdened with servicing user requests typically).

Nothing is returned from the subscribe function, so the command you have stopped on wouldn't have anything to print. Because the JavaScript in a browser executes in a single threaded way, the onmessage function couldn't log anything if execution is paused.

You should

Make sure that the data points have permissions set appropriately Set the read permission on the page that you don't want limited users to have access to Use ng-if / ng-disabled to hide or disable components on your page that everyone has access too <span>Your username is '{{User.current.username}}'.</span> <div ng-if="User.current.hasPermission('superadmin')"> <span>Your user is an administrator.</span> </div> <div> <md-button class="md-raised" ng-disabled="!User.current.hasPermission('superadmin')">Go to other page</md-button> </div>

I replied via email to check for /opt/mango/hs_err* files.

@phildunlap I moved enable-alph extension script to ext-enable folder, and also I made the SSL settings like before but I get the same errors and I couldn't navigate to the web page.

@phildunlap Thanks again!