Jens,
I don't believe it is supported on FreeBSD - I would recommend you stick
to the list here:
https://docs.datastax.com/en/landing_page/doc/landing_page/supportedPlatforms.html
. Also, I would suggest using Oracle JDK.
Regards,
Johnny
On 17 November 2017 at 11:06, Jens Grassel <j...@wegtam.com> wrote:
> Hi,
>
> we downloaded the latest release and tried to run it on a FreeBSD 11
> machine which resultet in a JVM crash. Here is the output:
>
> <---snip--->
> ./bin/cassandra -f ? 134
> CompilerOracle: dontinline
> org/apache/cassandra/db/Columns$Serializer.deserializeLargeSubset
> (Lorg/apache/cassandra/io/util/DataInputPlus;Lorg/
> apache/cassandra/db/Columns;I)Lorg/apache/cassandra/db/Columns;
> CompilerOracle: dontinline
> org/apache/cassandra/db/Columns$Serializer.serializeLargeSubset
> (Ljava/util/Collection;ILorg/apache/cassandra/db/Columns;
> ILorg/apache/cassandra/io/util/DataOutputPlus;)V
> CompilerOracle: dontinline
> org/apache/cassandra/db/Columns$Serializer.serializeLargeSubsetSize
> (Ljava/util/Collection;ILorg/apache/cassandra/db/Columns;I)I
> CompilerOracle: dontinline org/apache/cassandra/db/commitlog/
> AbstractCommitLogSegmentManager.advanceAllocatingFrom
> (Lorg/apache/cassandra/db/commitlog/CommitLogSegment;)V
> CompilerOracle: dontinline
> org/apache/cassandra/db/transform/BaseIterator.tryGetMoreContents
> ()Z
> CompilerOracle: dontinline
> org/apache/cassandra/db/transform/StoppingTransformation.stop
> ()V
> CompilerOracle: dontinline org/apache/cassandra/db/transform/
> StoppingTransformation.stopInPartition ()V
> CompilerOracle: dontinline org/apache/cassandra/io/util/
> BufferedDataOutputStreamPlus.doFlush (I)V
> CompilerOracle: dontinline org/apache/cassandra/io/util/
> BufferedDataOutputStreamPlus.writeExcessSlow ()V
> CompilerOracle: dontinline org/apache/cassandra/io/util/
> BufferedDataOutputStreamPlus.writeSlow (JI)V
> CompilerOracle: dontinline org/apache/cassandra/io/util/
> RebufferingInputStream.readPrimitiveSlowly (I)J
> CompilerOracle: inline
> org/apache/cassandra/db/rows/UnfilteredSerializer.serializeRowBody
> (Lorg/apache/cassandra/db/rows/Row;ILorg/apache/cassandra/db/
> SerializationHeader;Lorg/apache/cassandra/io/util/DataOutputPlus;)V
> CompilerOracle: inline org/apache/cassandra/io/util/Memory.checkBounds
> (JJ)V
> CompilerOracle: inline org/apache/cassandra/io/util/SafeMemory.checkBounds
> (JJ)V
> CompilerOracle: inline
> org/apache/cassandra/utils/AsymmetricOrdering.selectBoundary
> (Lorg/apache/cassandra/utils/AsymmetricOrdering/Op;II)I
> CompilerOracle: inline
> org/apache/cassandra/utils/AsymmetricOrdering.strictnessOfLessThan
> (Lorg/apache/cassandra/utils/AsymmetricOrdering/Op;)I
> CompilerOracle: inline org/apache/cassandra/utils/BloomFilter.indexes
> (Lorg/apache/cassandra/utils/IFilter/FilterKey;)[J
> CompilerOracle: inline org/apache/cassandra/utils/BloomFilter.setIndexes
> (JJIJ[J)V
> CompilerOracle: inline org/apache/cassandra/utils/ByteBufferUtil.compare
> (Ljava/nio/ByteBuffer;[B)I
> CompilerOracle: inline org/apache/cassandra/utils/ByteBufferUtil.compare
> ([BLjava/nio/ByteBuffer;)I
> CompilerOracle: inline
> org/apache/cassandra/utils/ByteBufferUtil.compareUnsigned
> (Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;)I
> CompilerOracle: inline
> org/apache/cassandra/utils/FastByteOperations$UnsafeOperations.compareTo
> (Ljava/lang/Object;JILjava/lang/Object;JI)I
> CompilerOracle: inline
> org/apache/cassandra/utils/FastByteOperations$UnsafeOperations.compareTo
> (Ljava/lang/Object;JILjava/nio/ByteBuffer;)I
> CompilerOracle: inline
> org/apache/cassandra/utils/FastByteOperations$UnsafeOperations.compareTo
> (Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;)I
> CompilerOracle: inline org/apache/cassandra/utils/vint/VIntCoding.encodeVInt
> (JI)[B
> INFO [main] 2017-11-17 11:03:12,020 YamlConfigurationLoader.java:89 -
> Configuration location: file:/usr/home/jens/apache-cassandra-3.11.1/conf/
> cassandra.yaml
> INFO [main] 2017-11-17 11:03:12,366 Config.java:481 - Node
> configuration:[allocate_tokens_for_keyspace=null;
> authenticator=AllowAllAuthenticator;
> authorizer=AllowAllAuthorizer; auto_bootstrap=true; auto_snapshot=true;
> back_pressure_enabled=false; back_pressure_strategy=org.
> apache.cassandra.net.RateBasedBackPressure{high_ratio=0.9, factor=5,
> flow=FAST}; batch_size_fail_threshold_in_kb=50;
> batch_size_warn_threshold_in_kb=5; batchlog_replay_throttle_in_kb=1024;
> broadcast_address=null; broadcast_rpc_address=null;
> buffer_pool_use_heap_if_exhausted=true;
> cas_contention_timeout_in_ms=1000; cdc_enabled=false;
> cdc_free_space_check_interval_ms=250; cdc_raw_directory=null;
> cdc_total_space_in_mb=0; client_encryption_options=<REDACTED>;
> cluster_name=Test Cluster; column_index_cache_size_in_kb=2;
> column_index_size_in_kb=64; commit_failure_policy=stop;
> commitlog_compression=null; commitlog_directory=null;
> commitlog_max_compression_buffers_in_pool=3;
> commitlog_periodic_queue_size=-1; commitlog_segment_size_in_mb=32;
> commitlog_sync=periodic; commitlog_sync_batch_window_in_ms=NaN;
> commitlog_sync_period_in_ms=10000; commitlog_total_space_in_mb=null;
> compaction_large_partition_warning_threshold_mb=100;
> compaction_throughput_mb_per_sec=16; concurrent_compactors=null;
> concurrent_counter_writes=32; concurrent_materialized_view_writes=32;
> concurrent_reads=32; concurrent_replicates=null; concurrent_writes=32;
> counter_cache_keys_to_save=2147483647; counter_cache_save_period=7200;
> counter_cache_size_in_mb=null; counter_write_request_timeout_in_ms=5000;
> credentials_cache_max_entries=1000; credentials_update_interval_in_ms=-1;
> credentials_validity_in_ms=2000; cross_node_timeout=false;
> data_file_directories=[Ljava.lang.String;@48524010;
> disk_access_mode=auto; disk_failure_policy=stop;
> disk_optimization_estimate_percentile=0.95;
> disk_optimization_page_cross_chance=0.1; disk_optimization_strategy=ssd;
> dynamic_snitch=true; dynamic_snitch_badness_threshold=0.1;
> dynamic_snitch_reset_interval_in_ms=600000;
> dynamic_snitch_update_interval_in_ms=100;
> enable_scripted_user_defined_functions=false;
> enable_user_defined_functions=false;
> enable_user_defined_functions_threads=true;
> encryption_options=null; endpoint_snitch=SimpleSnitch;
> file_cache_size_in_mb=null; gc_log_threshold_in_ms=200;
> gc_warn_threshold_in_ms=1000; hinted_handoff_disabled_datacenters=[];
> hinted_handoff_enabled=true; hinted_handoff_throttle_in_kb=1024;
> hints_compression=null; hints_directory=null; hints_flush_period_in_ms=10000;
> incremental_backups=false; index_interval=null;
> index_summary_capacity_in_mb=null;
> index_summary_resize_interval_in_minutes=60;
> initial_token=null; inter_dc_stream_throughput_outbound_megabits_per_sec=200;
> inter_dc_tcp_nodelay=false; internode_authenticator=null;
> internode_compression=dc; internode_recv_buff_size_in_bytes=0;
> internode_send_buff_size_in_bytes=0; key_cache_keys_to_save=2147483647;
> key_cache_save_period=14400; key_cache_size_in_mb=null;
> listen_address=localhost; listen_interface=null;
> listen_interface_prefer_ipv6=false; listen_on_broadcast_address=false;
> max_hint_window_in_ms=10800000; max_hints_delivery_threads=2;
> max_hints_file_size_in_mb=128; max_mutation_size_in_kb=null;
> max_streaming_retries=3; max_value_size_in_mb=256;
> memtable_allocation_type=heap_buffers; memtable_cleanup_threshold=null;
> memtable_flush_writers=0; memtable_heap_space_in_mb=null;
> memtable_offheap_space_in_mb=null; min_free_space_per_drive_in_mb=50;
> native_transport_max_concurrent_connections=-1; native_transport_max_
> concurrent_connections_per_ip=-1; native_transport_max_frame_size_in_mb=256;
> native_transport_max_threads=128; native_transport_port=9042;
> native_transport_port_ssl=null; num_tokens=256;
> otc_backlog_expiration_interval_ms=200;
> otc_coalescing_enough_coalesced_messages=8; otc_coalescing_strategy=DISABLED;
> otc_coalescing_window_us=200;
> partitioner=org.apache.cassandra.dht.Murmur3Partitioner;
> permissions_cache_max_entries=1000; permissions_update_interval_in_ms=-1;
> permissions_validity_in_ms=2000; phi_convict_threshold=8.0;
> prepared_statements_cache_size_mb=null; range_request_timeout_in_ms=10000;
> read_request_timeout_in_ms=5000; request_scheduler=org.apache.
> cassandra.scheduler.NoScheduler; request_scheduler_id=null;
> request_scheduler_options=null; request_timeout_in_ms=10000;
> role_manager=CassandraRoleManager;
> roles_cache_max_entries=1000; roles_update_interval_in_ms=-1;
> roles_validity_in_ms=2000; row_cache_class_name=org.
> apache.cassandra.cache.OHCProvider; row_cache_keys_to_save=2147483647;
> row_cache_save_period=0; row_cache_size_in_mb=0; rpc_address=localhost;
> rpc_interface=null; rpc_interface_prefer_ipv6=false; rpc_keepalive=true;
> rpc_listen_backlog=50; rpc_max_threads=2147483647; rpc_min_threads=16;
> rpc_port=9160; rpc_recv_buff_size_in_bytes=null;
> rpc_send_buff_size_in_bytes=null; rpc_server_type=sync;
> saved_caches_directory=null; seed_provider=org.apache.cassandra.locator.
> SimpleSeedProvider{seeds=127.0.0.1}; server_encryption_options=<REDACTED>;
> slow_query_log_timeout_in_ms=500; snapshot_before_compaction=false;
> ssl_storage_port=7001; sstable_preemptive_open_interval_in_mb=50;
> start_native_transport=true; start_rpc=false; storage_port=7000;
> stream_throughput_outbound_megabits_per_sec=200;
> streaming_keep_alive_period_in_secs=300;
> streaming_socket_timeout_in_ms=86400000;
> thrift_framed_transport_size_in_mb=15; thrift_max_message_length_in_mb=16;
> thrift_prepared_statements_cache_size_mb=null;
> tombstone_failure_threshold=100000; tombstone_warn_threshold=1000;
> tracetype_query_ttl=86400; tracetype_repair_ttl=604800;
> transparent_data_encryption_options=org.apache.cassandra.config.
> TransparentDataEncryptionOptions@4b168fa9; trickle_fsync=false;
> trickle_fsync_interval_in_kb=10240; truncate_request_timeout_in_ms=60000;
> unlogged_batch_across_partitions_warn_threshold=10;
> user_defined_function_fail_timeout=1500;
> user_defined_function_warn_timeout=500;
> user_function_timeout_policy=die; windows_timer_interval=1;
> write_request_timeout_in_ms=2000]
> INFO [main] 2017-11-17 11:03:12,366 DatabaseDescriptor.java:367 -
> DiskAccessMode 'auto' determined to be mmap, indexAccessMode is mmap
> INFO [main] 2017-11-17 11:03:12,367 DatabaseDescriptor.java:421 - Global
> memtable on-heap threshold is enabled at 1009MB
> INFO [main] 2017-11-17 11:03:12,367 DatabaseDescriptor.java:425 - Global
> memtable off-heap threshold is enabled at 1009MB
> WARN [main] 2017-11-17 11:03:12,469 DatabaseDescriptor.java:546 - Only
> 16,571GiB free across all data volumes. Consider adding more capacity to
> your cluster or removing obsolete snapshots
> INFO [main] 2017-11-17 11:03:12,491 RateBasedBackPressure.java:123 -
> Initialized back-pressure with high ratio: 0.9, factor: 5, flow: FAST,
> window size: 2000.
> INFO [main] 2017-11-17 11:03:12,492 DatabaseDescriptor.java:725 -
> Back-pressure is disabled with strategy org.apache.cassandra.net.
> RateBasedBackPressure{high_ratio=0.9, factor=5, flow=FAST}.
> INFO [main] 2017-11-17 11:03:12,568 JMXServerUtils.java:249 - Configured
> JMX server at: service:jmx:rmi://127.0.0.1/jndi/rmi://127.0.0.1:7199/
> jmxrmi
> INFO [main] 2017-11-17 11:03:12,577 CassandraDaemon.java:471 - Hostname:
> erdloch.wegtam.local
> INFO [main] 2017-11-17 11:03:12,578 CassandraDaemon.java:478 - JVM
> vendor/version: OpenJDK 64-Bit Server VM/1.8.0_144
> INFO [main] 2017-11-17 11:03:12,580 CassandraDaemon.java:479 - Heap size:
> 3,941GiB/3,941GiB
> INFO [main] 2017-11-17 11:03:12,581 CassandraDaemon.java:484 - Code Cache
> Non-heap memory: init = 2555904(2496K) used = 4497408(4392K) committed =
> 4521984(4416K) max = 251658240(245760K)
> INFO [main] 2017-11-17 11:03:12,582 CassandraDaemon.java:484 - Metaspace
> Non-heap memory: init = 0(0K) used = 16763016(16370K) committed =
> 17432576(17024K) max = -1(-1K)
> INFO [main] 2017-11-17 11:03:12,586 CassandraDaemon.java:484 - Compressed
> Class Space Non-heap memory: init = 0(0K) used = 2027264(1979K) committed =
> 2228224(2176K) max = 1073741824(1048576K)
> INFO [main] 2017-11-17 11:03:12,587 CassandraDaemon.java:484 - Par Eden
> Space Heap memory: init = 335544320(327680K) used = 100682416(98322K)
> committed = 335544320(327680K) max = 335544320(327680K)
> INFO [main] 2017-11-17 11:03:12,588 CassandraDaemon.java:484 - Par
> Survivor Space Heap memory: init = 41943040(40960K) used = 0(0K) committed
> = 41943040(40960K) max = 41943040(40960K)
> INFO [main] 2017-11-17 11:03:12,588 CassandraDaemon.java:484 - CMS Old
> Gen Heap memory: init = 3854565376(3764224K) used = 0(0K) committed =
> 3854565376(3764224K) max = 3854565376(3764224K)
> INFO [main] 2017-11-17 11:03:12,589 CassandraDaemon.java:486 - Classpath:
> ./bin/../conf:./bin/../build/classes/main:./bin/../build/
> classes/thrift:./bin/../lib/airline-0.6.jar:./bin/../lib/
> antlr-runtime-3.5.2.jar:./bin/../lib/apache-cassandra-3.11.
> 1.jar:./bin/../lib/apache-cassandra-thrift-3.11.1.jar:./
> bin/../lib/asm-5.0.4.jar:./bin/../lib/caffeine-2.2.6.jar:
> ./bin/../lib/cassandra-driver-core-3.0.1-shaded.jar:./bin/..
> /lib/commons-cli-1.1.jar:./bin/../lib/commons-codec-1.9.
> jar:./bin/../lib/commons-lang3-3.1.jar:./bin/../lib/
> commons-math3-3.2.jar:./bin/../lib/compress-lzf-0.8.4.jar:./
> bin/../lib/concurrent-trees-2.4.0.jar:./bin/../lib/
> concurrentlinkedhashmap-lru-1.4.jar:./bin/../lib/disruptor-
> 3.0.1.jar:./bin/../lib/ecj-4.4.2.jar:./bin/../lib/guava-18.
> 0.jar:./bin/../lib/HdrHistogram-2.1.9.jar:./bin/.
> ./lib/high-scale-lib-1.0.6.jar:./bin/../lib/hppc-0.5.4.
> jar:./bin/../lib/jackson-core-asl-1.9.2.jar:./bin/../lib/
> jackson-mapper-asl-1.9.2.jar:./bin/../lib/jamm-0.3.0.jar:./
> bin/../lib/javax.inject.jar:./bin/../lib/jbcrypt-0.3m.jar:./
> bin/../lib/jcl-over-slf4j-1.7.7.jar:./bin/../lib/jctools-
> core-1.2.1.jar:./bin/../lib/jflex-1.6.0.jar:./bin/../lib/
> jna-4.2.2.jar:./bin/../lib/joda-time-2.4.jar:./bin/../
> lib/json-simple-1.1.jar:./bin/../lib/jstackjunit-0.0.1.jar:.
> /bin/../lib/libthrift-0.9.2.jar:./bin/../lib/log4j-over-
> slf4j-1.7.7.jar:./bin/../lib/logback-classic-1.1.3.jar:./
> bin/../lib/logback-core-1.1.3.jar:./bin/../lib/lz4-1.3.0.
> jar:./bin/../lib/metrics-core-3.1.0.jar:./bin/../lib/
> metrics-jvm-3.1.0.jar:./bin/../lib/metrics-logback-3.1.0.
> jar:./bin/../lib/netty-all-4.0.44.Final.jar:./bin/../lib/
> ohc-core-0.4.4.jar:./bin/../lib/ohc-core-j8-0.4.4.jar:./
> bin/../lib/reporter-config-base-3.0.3.jar:./bin/../lib/
> reporter-config3-3.0.3.jar:./bin/../lib/sigar-1.6.4.jar:./
> bin/../lib/slf4j-api-1.7.7.jar:./bin/../lib/snakeyaml-1.
> 11.jar:./bin/../lib/snappy-java-1.1.1.7.jar:./bin/../lib/
> snowball-stemmer-1.3.0.581.1.jar:./bin/../lib/ST4-4.0.8.
> jar:./bin/../lib/stream-2.5.2.jar:./bin/../lib/thrift-
> server-0.3.7.jar:./bin/../lib/jsr223/*/*.jar:./bin/../lib/jamm-0.3.0.jar
> INFO [main] 2017-11-17 11:03:12,590 CassandraDaemon.java:488 - JVM
> Arguments: [-Xloggc:./bin/../logs/gc.log, -ea, -XX:+UseThreadPriorities,
> -XX:ThreadPriorityPolicy=42, -XX:+HeapDumpOnOutOfMemoryError, -Xss256k,
> -XX:StringTableSize=1000003, -XX:+AlwaysPreTouch, -XX:-UseBiasedLocking,
> -XX:+UseTLAB, -XX:+ResizeTLAB, -XX:+UseNUMA, -XX:+PerfDisableSharedMem,
> -Djava.net.preferIPv4Stack=true, -XX:+UseParNewGC,
> -XX:+UseConcMarkSweepGC, -XX:+CMSParallelRemarkEnabled,
> -XX:SurvivorRatio=8, -XX:MaxTenuringThreshold=1, -XX:
> CMSInitiatingOccupancyFraction=75, -XX:+UseCMSInitiatingOccupancyOnly,
> -XX:CMSWaitDuration=10000, -XX:+CMSParallelInitialMarkEnabled,
> -XX:+CMSEdenChunksRecordAlways,
> -XX:+CMSClassUnloadingEnabled, -XX:+PrintGCDetails, -XX:+PrintGCDateStamps,
> -XX:+PrintHeapAtGC, -XX:+PrintTenuringDistribution,
> -XX:+PrintGCApplicationStoppedTime,
> -XX:+PrintPromotionFailure, -XX:+UseGCLogFileRotation,
> -XX:NumberOfGCLogFiles=10, -XX:GCLogFileSize=10M, -Xms4075M, -Xmx4075M,
> -Xmn400M, -XX:CompileCommandFile=./bin/../conf/hotspot_compiler,
> -javaagent:./bin/../lib/jamm-0.3.0.jar, -Dcassandra.jmx.local.port=7199,
> -Dcom.sun.management.jmxremote.authenticate=false, -Dcom.sun.management.
> jmxremote.password.file=/etc/cassandra/jmxremote.password,
> -Djava.library.path=./bin/../lib/sigar-bin,
> -Dlogback.configurationFile=logback.xml,
> -Dcassandra.logdir=./bin/../logs, -Dcassandra.storagedir=./bin/../data,
> -Dcassandra-foreground=yes]
> WARN [main] 2017-11-17 11:03:12,647 NativeLibrary.java:187 - Unable to
> lock JVM memory (ENOMEM). This can result in part of the JVM being swapped
> out, especially with mmapped I/O enabled. Increase RLIMIT_MEMLOCK or run
> Cassandra as root.
> WARN [main] 2017-11-17 11:03:12,649 StartupChecks.java:133 - jemalloc
> shared library could not be preloaded to speed up memory allocations
> WARN [main] 2017-11-17 11:03:12,649 StartupChecks.java:166 - JMX is not
> enabled to receive remote connections. Please see cassandra-env.sh for more
> info.
> WARN [main] 2017-11-17 11:03:12,650 StartupChecks.java:203 - OpenJDK is
> not recommended. Please upgrade to the newest Oracle Java release
> INFO [main] 2017-11-17 11:03:12,653 SigarLibrary.java:44 - Initializing
> SIGAR library
> INFO [main] 2017-11-17 11:03:12,671 SigarLibrary.java:57 - Could not
> initialize SIGAR library org.hyperic.sigar.Sigar.
> getFileSystemListNative()[Lorg/hyperic/sigar/FileSystem;
> INFO [main] 2017-11-17 11:03:12,672 SigarLibrary.java:185 - Sigar could
> not be initialized, test for checking degraded mode omitted.
> INFO [main] 2017-11-17 11:03:12,919 QueryProcessor.java:116 - Initialized
> prepared statement caches with 15 MB (native) and 15 MB (Thrift)
> INFO [main] 2017-11-17 11:03:13,498 ColumnFamilyStore.java:408 -
> Initializing system.IndexInfo
> INFO [main] 2017-11-17 11:03:14,393 ColumnFamilyStore.java:408 -
> Initializing system.batches
> INFO [main] 2017-11-17 11:03:14,403 ColumnFamilyStore.java:408 -
> Initializing system.paxos
> INFO [main] 2017-11-17 11:03:14,437 ColumnFamilyStore.java:408 -
> Initializing system.local
> INFO [SSTableBatchOpen:4] 2017-11-17 11:03:14,476 BufferPool.java:230 -
> Global buffer pool is enabled, when pool is exhausted (max is 512,000MiB)
> it will allocate on heap
> #
> # A fatal error has been detected by the Java Runtime Environment:
> #
> # SIGSEGV (0xb) at pc=0x00000008020cf55d, pid=60352,
> tid=0x0000000000018ecf
> #
> # JRE version: OpenJDK Runtime Environment (8.0_144-b01) (build
> 1.8.0_144-b01)
> # Java VM: OpenJDK 64-Bit Server VM (25.144-b01 mixed mode bsd-amd64
> compressed oops)
> # Problematic frame:
> # V [libjvm.so+0x8cf55d] JVM_handle_bsd_signal+0x11ffdd
> #
> # Core dump written. Default location: /usr/home/jens/apache-
> cassandra-3.11.1/java.core
> #
> # An error report file with more information is saved as:
> # /usr/home/jens/apache-cassandra-3.11.1/hs_err_pid60352.log
> #
> # If you would like to submit a bug report, please visit:
> # http://bugreport.java.com/bugreport/crash.jsp
> #
> <---snip--->
>
> Is BSD not supported by Cassandra or are we missing something else here?
>
> Regards,
>
> Jens
>
> --
> CTO, Wegtam GmbH, 17. Nebelung 2017, 11:02
> Homepage : https://www.wegtam.com
>
> We'll pivot at warp 2 and bring all tubes to bear, Mr. Sulu!
>
--
*Johnny Miller*
Co-Founder & CTO | joh...@digitalis.io
--
--
Any views or opinions presented are solely those of the author and do not
necessarily represent those of the company. digitalis.io is a trading name
of Digitalis.io Ltd. Company Number: 98499457 Registered in England and
Wales. Registered Office: Kemp House, 152 City Road, London, EC1V 2NX,
United Kingddom
