Re: How to serialize Result in HBase 1.0

Thanks for your response Ted, I've solved this. Just do some settings as follows: *conf.setStrings("io.serializations", conf.get("io.serializations"), ResultSerialization.class.getName());* and problem has gone. Ted Yu 于2016年4月12日周二 上午8:54写道： > It seems your code

Re: unstable cluster

>From region server log: 2016-04-11 03:11:51,589 WARN org.apache.zookeeper.ClientCnxnSocket: Connected to an old server; r-o mode will be unavailable 2016-04-11 03:11:51,589 INFO org.apache.zookeeper.ClientCnxn: Unable to reconnect to ZooKeeper service, session 0x52ee1452fec5ac has expired,

Re: How to serialize Result in HBase 1.0

It seems your code didn't go through. Please take a look at ResultSerialization and related classes. Cheers On Mon, Apr 11, 2016 at 5:29 PM, 乔彦克 wrote: > Hi, all > recently we upgrade our HBase cluster from cdh-0.94 to cdh-1.0. In 0.94 > we use Result.java(implement

How to serialize Result in HBase 1.0

Hi, all recently we upgrade our HBase cluster from cdh-0.94 to cdh-1.0. In 0.94 we use Result.java(implement Writable) as the map out value. [image: pasted1] but int the newer HBase version Result.java has changed, it can't be serialized any more. Is there any alternative methods to use Result

unstable cluster

Hello - We've started experiencing regular failures of our HBase cluster. For the last week we've had nightly failures about 1hr after a heavy batch process starts. In the logs below we see the failure starting at 2016-04-11 03:11 in zookeeper, master and region server logs: zookeeper:

Re: Timestamp of HBase data

Hi Zheng, Your intuition is correct. If the client does not specify a timestamp for writes, then the region server will use the system clock to do so. If you send a Put to a region hosted by a server with a clock that is 50 seconds slow, and that region has existing Cell(s) with the same row &

[ANNOUNCE] Apache HBase 1.2.1 is now available for download

The HBase team is happy to announce the immediate availability of HBase 1.2.1. Apache HBase is an open-source, distributed, versioned, non-relational database. Apache HBase gives you low latency random access to billions of rows with millions of columns atop non-specialized hardware. To learn

Re: HBase 1.2 master CPU usage spin

that should be fixed in 1.2.1 with HBASE-15422 Matteo On Mon, Apr 11, 2016 at 5:46 AM, Ted Yu wrote: > Can you look at master log during this period to see what procedure was > retried ? > > Turning on DEBUG logging if necessary and pastebin relevant portion of > master

RE: Question about open table

Yes, sorry, I mean 1.x -Original Message- From: Ted Yu [mailto:yuzhih...@gmail.com] Sent: Monday, April 11, 2016 9:51 AM To: user@hbase.apache.org Subject: Re: Question about open table bq. I am using hbase 2.x 2.0 has not been released yet. Probably you meant 1.x ? On Mon, Apr 11,

Re: Question about open table

bq. I am using hbase 2.x 2.0 has not been released yet. Probably you meant 1.x ? On Mon, Apr 11, 2016 at 6:48 AM, Yi Jiang wrote: > Thanks > I am using hbase 2.x, so only once to create the connection in my project. > According to Ted, the getTable is not expensive, then

RE: Question about open table

Thanks I am using hbase 2.x, so only once to create the connection in my project. According to Ted, the getTable is not expensive, then I am able to get and close table in each request. Jacky -Original Message- From: Yu Li [mailto:car...@gmail.com] Sent: Monday, April 11, 2016 12:05 AM

Re: Processing rows in parallel with MapReduce jobs.

bq. if they are located in the same split? Probably you meant same region. Can you show the getSplits() for the InputFormat of your MapReduce job ? Thanks On Mon, Apr 11, 2016 at 5:48 AM, Ivan Cores gonzalez wrote: > Hi all, > > I have a small question regarding the

Re: HBase TTL

Have you looked at : http://hbase.apache.org/book.html#ttl Please describe your use case. Thanks On Mon, Apr 11, 2016 at 2:11 AM, hsdcl...@163.com wrote: > hi, > > I want to know the principle of HBase TTL,I would like to use the same > principle to develop Rowkey of TTL,

Re: Re: HBase region pre-split and store evenly

Please take a look at: http://hbase.apache.org/book.html#disable.splitting especially the section titled: Determine the Optimal Number of Pre-Split Regions For writing data evenly across the cluster, can you tell us some more about your use case(s) ? Thanks On Tue, Apr 5, 2016 at 11:48 PM,

Processing rows in parallel with MapReduce jobs.

Hi all, I have a small question regarding the MapReduce jobs behaviour with HBase. I have a HBase test table with only 8 rows. I splitted the table with the hbase shell split command into 2 splits. So now there are 4 rows in every split. I create a MapReduce job that only prints the row

Re: HBase 1.2 master CPU usage spin

Can you look at master log during this period to see what procedure was retried ? Turning on DEBUG logging if necessary and pastebin relevant portion of master log. Thanks > On Apr 11, 2016, at 1:11 AM, Kevin Bowling wrote: > > Hi, > > I'm running HBase 1.2.0 on

Timestamp of HBase data

Hi, I'm wondering which service on HBase service family is responsible for setting timestamp of data when saving it to HBase? Recently I found one of my server (has region server and some HDFS services) in HBase cluser has 50 seconds behinds to others on system clock (same time region). For

HBase 1.2 master CPU usage spin

Hi, I'm running HBase 1.2.0 on FreeBSD via the ports system ( http://www.freshports.org/databases/hbase/), and it is generally working well. However, in an HA setup, the HBase master spins at 200% CPU usage when it is active and this follows the active master and disappears when standby. Since

why Get#setMaxVersions throw an IOException

Hi, there! I'm using hbase-client 1.1.2 and I found that Get#setMaxVersions would throw an IOException if the the parameter maxVersions is less than 0. I'm just wondering what's the point in throwing an IOException instead of IllegalArgumentException.