Android 7.1.1 Nougat – snapshot

Android 7.1.1 Snapshot

android_7_1_1_snapshot

android_7_1_1

some features:

  • Go to you app shortcuts directly from the mobile phone home screen;
  • Go to you favor app, just simply long pressing the app icon;
  • Send GIFs directly from your android keyboard;
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Apache Spark 2.1.0 Released

Spark Release 2.1.0

apache_spark

Apache Spark is a fast and general-purpose cluster computing system. It provides high-level APIs in Java, Scala, Python and R, and an optimized engine that supports general execution graphs. It also supports a rich set of higher-level tools including Spark SQL for SQL and structured data processing, MLlib for machine learning, GraphX for graph processing, and Spark Streaming.

It runs programs up to 100x faster than Hadoop MapReduce in memory, or 10x faster on disk.

Spark runs on Hadoop, Mesos, standalone, or in the cloud. It can access diverse data sources including HDFS, Cassandra, HBase, and S3.

It’s ideal to build parallel apps too.

http://spark.apache.org/docs/latest/quick-start.html

JDK8u111/112 – MD5 is no longer considered secure

Oracle JRE will no longer trust MD5-signed code by default

Beginning with the April 2017 Critical Patch Update, JAR files signed using MD5 (RSA algorithm) will no longer be considered as signed by the Oracle JRE.

Oracle Java SE 8u131 which will be released with the April 2017 Critical Patch Update.

jdk_8u_111_112_warning

Affected applications: Java applets, or Java Web Start applications.

To check your app/jar file:

jarsigner -verify -J-Djava.security.debug=jar mySynopticApp.jar

To remove any existing MD5 signatures first before re-signing using the zip utility as follows:
zip -d mySynopticApp.jar 'META-INF/*.SF' 'META-INF/*.RSA' 'META-INF/*.DSA'

 

More 1 second (leap second) – 2017

Counting down to 2017 will take more 1 second, e.g.

After 23.59:59 on 31 December, it will be 23:59:60

Leap seconds are a periodic one-second adjustment of Coordinated Universal Time(UTC) in order to keep a system’s time of day close to the mean solar time.

However, the Earth’s rotation speed varies in response to climatic and geological events, and due to this, UTC leap seconds are irregularly spaced and unpredictable.

leap_second_centos_1

For systems (redhat 4/5/6/7) not synchronized by ntpd or ptp an updated tzdata package that contains the December 31st leap second is required.

patch:

tzdata-2016g-2.el4 (redhat4)

tzdata-2016g-2.el5 (redhat5)

tzdata-2016g-2.el6 (redhat 6)

tzdata-2016g-2.el7(redhat 7)