Based on recent bugs ( #3652 ) where searchers were acquired multiple times
but never released 'IndexShard#searcher()' has not a more accurate name.
Closes#3653
When a node shuts down thread pools might throw
ESRejectedExecutionException and our test framework fails tests if
exceptions are not caught hitting uncaught exception handler.
When installing a plugin, we use:
```sh
bin/plugin --install groupid/artifactid/version
```
But when removing the plugin, we only support:
```sh
bin/plugin --remove dirname
```
where `dirname` is the directory name of the plugin under `/plugins` dir.
Closes#3421.
The inner call to the completion stats pulled a second searcher
that never got released causing the underlying readers to never
get closed unless the node is shut down. This was triggered
with literally each stats call including the completion stats
even if no completion service was used on the index.
Closes#3652
This commit adds two main pieces, the first is a ClusterInfoService
that provides a service running on the master nodes that fetches the
total/free bytes for each data node in the cluster as well as the
sizes of all shards in the cluster. This information is gathered by
default every 30 seconds, and can be changed dynamically by setting
the `cluster.info.update.interval` setting. This ClusterInfoService
can hopefully be used in the future to weight nodes for allocation
based on their disk usage, if desired.
The second main piece is the DiskThresholdDecider, which can disallow
a shard from being allocated to a node, or from remaining on the node
depending on configuration parameters. There are three main
configuration parameters for the DiskThresholdDecider:
`cluster.routing.allocation.disk.threshold_enabled` controls whether
the decider is enabled. It defaults to false (disabled). Note that the
decider is also disabled for clusters with only a single data node.
`cluster.routing.allocation.disk.watermark.low` controls the low
watermark for disk usage. It defaults to 0.70, meaning ES will not
allocate new shards to nodes once they have more than 70% disk
used. It can also be set to an absolute byte value (like 500mb) to
prevent ES from allocating shards if less than the configured amount
of space is available.
`cluster.routing.allocation.disk.watermark.high` controls the high
watermark. It defaults to 0.85, meaning ES will attempt to relocate
shards to another node if the node disk usage rises above 85%. It can
also be set to an absolute byte value (similar to the low watermark)
to relocate shards once less than the configured amount of space is
available on the node.
Closes#3480
It supports multiple logger:level comma separated key value pairs
Use the _root keyword to set the root logger level
e.g. @Logging("_root:DEBUG,org.elasticsearch.cluster.metadata:TRACE")
or just @TestLogging("_root:DEBUG,cluster.metadata:TRACE") since we start the test with -Des.logger.prefix=
The completion suggester reserves 0x00 and 0xFF as for internal use.
If those chars are used in the input string an IAE is thrown and the
input is rejected.
Closes#3648
SuggestSearchTests had tons of duplicate code and didn't use all of the
fancy new integration test helper method. I've removed a ton of duplicate
code and used as many of the nice test helper method I could think of.
Closes#3611
The reason behind this is that the `_name` support has been extended to queries as well and the name `namedQueries` suggests better that it is applicable to the whole query dsl.
Relates to #3581
Sometimes, one wants to just control the number of processors our different size base calculations for thread pools and network workers are based on, and not use the reported available processor by the OS. Add processors setting, where it can be controlled.
closes#3643
Currently, in NettyTransport the locks for connecting and disconnecting channels are stored in a ConcurrentMap that has 500 entries. A tread can acquire a lock for an id and the lock returned is chosen on a hash function computed from the id.
Unfortunately, a collision of two ids can cause a deadlock as follows:
Scenario: one master (no data), one datanode (only data node)
DiscoveryNode id of master is X
DiscoveryNode id of datanode is Y
Both X and Y cause the same lock to be returned by NettyTransport#connectLock()
Both are up and running, all is fine until master stops.
Thread 1: The master fault detection of the datanode is notified (onNodeDisconnected()), which in turn leads the node to try and reconnect to master via the callstack titled "Thread 1" below.
-> connectToNode() is called and lock for X is acquired. The method waits for 45s for the cannels to reconnect.
Furthermore, Thread 1 holds the NettyTransport#masterNodeMutex.
Thread 2: The connection fails with an exception (connection refused, see callstack below), because the master shut down already. The exception is handled in NettyTransport#exceptionCaught which calls NettyTransport#disconnectFromNodeChannel. This method acquires the lock for Y (see Thread 2 below).
Now, if Y and X have two different locks, this would get the lock, disconnect the channels and notify thread 1. But since X and Y have the same locks, thread 2 is deadlocked with thread 1 which waits for 45s.
In this time, no thread can acquire the masterNodeMutex (held by thread 1), so the node can, for example, not stop.
This commit introduces a mechanism that assures unique locks for unique ids. This lock is not reentrant and therfore assures that threads can not end up in an infinite recursion (see Thread 3 below for an example on how a thread can aquire a lock twice).
While this is not a problem right now, it is potentially dangerous to have it that way, because the callstacks are complex as is and slight changes might cause unecpected recursions.
Thread 1
----
owns: Object (id=114)
owns: Object (id=118)
waiting for: DefaultChannelFuture (id=140)
Object.wait(long) line: not available [native method]
DefaultChannelFuture(Object).wait(long, int) line: 461
DefaultChannelFuture.await0(long, boolean) line: 311
DefaultChannelFuture.awaitUninterruptibly(long) line: 285
NettyTransport.connectToChannels(NettyTransport$NodeChannels, DiscoveryNode) line: 672
NettyTransport.connectToNode(DiscoveryNode, boolean) line: 609
NettyTransport.connectToNode(DiscoveryNode) line: 579
TransportService.connectToNode(DiscoveryNode) line: 129
MasterFaultDetection.handleTransportDisconnect(DiscoveryNode) line: 195
MasterFaultDetection.access$0(MasterFaultDetection, DiscoveryNode) line: 188
MasterFaultDetection$FDConnectionListener.onNodeDisconnected(DiscoveryNode) line: 245
TransportService$Adapter$2.run() line: 298
EsThreadPoolExecutor(ThreadPoolExecutor).runWorker(ThreadPoolExecutor$Worker) line: 1145
ThreadPoolExecutor$Worker.run() line: 615
Thread.run() line: 724
Thread 2
-------
waiting for: Object (id=114)
NettyTransport.disconnectFromNodeChannel(Channel, Throwable) line: 790
NettyTransport.exceptionCaught(ChannelHandlerContext, ExceptionEvent) line: 495
MessageChannelHandler.exceptionCaught(ChannelHandlerContext, ExceptionEvent) line: 228
MessageChannelHandler(SimpleChannelUpstreamHandler).handleUpstream(ChannelHandlerContext, ChannelEvent) line: 112
DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564
DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(ChannelEvent) line: 791
SizeHeaderFrameDecoder(FrameDecoder).exceptionCaught(ChannelHandlerContext, ExceptionEvent) line: 377
SizeHeaderFrameDecoder(SimpleChannelUpstreamHandler).handleUpstream(ChannelHandlerContext, ChannelEvent) line: 112
DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline$DefaultChannelHandlerContext, ChannelEvent) line: 564
DefaultChannelPipeline.sendUpstream(ChannelEvent) line: 559
Channels.fireExceptionCaught(Channel, Throwable) line: 525
NioClientBoss.processSelectedKeys(Set<SelectionKey>) line: 110
NioClientBoss.process(Selector) line: 79
NioClientBoss(AbstractNioSelector).run() line: 312
NioClientBoss.run() line: 42
ThreadRenamingRunnable.run() line: 108
DeadLockProofWorker$1.run() line: 42
ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) line: 1145
ThreadPoolExecutor$Worker.run() line: 615
Thread.run() line: 724
Thread 3
---------
org.elasticsearch.transport.netty.NettyTransport.disconnectFromNode(NettyTransport.java:772)
org.elasticsearch.transport.netty.NettyTransport.access$1200(NettyTransport.java:92)
org.elasticsearch.transport.netty.NettyTransport$ChannelCloseListener.operationComplete(NettyTransport.java:830)
org.jboss.netty.channel.DefaultChannelFuture.notifyListener(DefaultChannelFuture.java:427)
org.jboss.netty.channel.DefaultChannelFuture.notifyListeners(DefaultChannelFuture.java:418)
org.jboss.netty.channel.DefaultChannelFuture.setSuccess(DefaultChannelFuture.java:362)
org.jboss.netty.channel.AbstractChannel$ChannelCloseFuture.setClosed(AbstractChannel.java:355)
org.jboss.netty.channel.AbstractChannel.setClosed(AbstractChannel.java:185)
org.jboss.netty.channel.socket.nio.AbstractNioChannel.setClosed(AbstractNioChannel.java:197)
org.jboss.netty.channel.socket.nio.NioSocketChannel.setClosed(NioSocketChannel.java:84)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.close(AbstractNioWorker.java:357)
org.jboss.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:58)
org.jboss.netty.channel.Channels.close(Channels.java:812)
org.jboss.netty.channel.AbstractChannel.close(AbstractChannel.java:197)
org.elasticsearch.transport.netty.NettyTransport$NodeChannels.closeChannelsAndWait(NettyTransport.java:892)
org.elasticsearch.transport.netty.NettyTransport$NodeChannels.close(NettyTransport.java:879)
org.elasticsearch.transport.netty.NettyTransport.disconnectFromNode(NettyTransport.java:778)
org.elasticsearch.transport.netty.NettyTransport.access$1200(NettyTransport.java:92)
org.elasticsearch.transport.netty.NettyTransport$ChannelCloseListener.operationComplete(NettyTransport.java:830)
org.jboss.netty.channel.DefaultChannelFuture.notifyListener(DefaultChannelFuture.java:427)
org.jboss.netty.channel.DefaultChannelFuture.notifyListeners(DefaultChannelFuture.java:418)
org.jboss.netty.channel.DefaultChannelFuture.setSuccess(DefaultChannelFuture.java:362)
org.jboss.netty.channel.AbstractChannel$ChannelCloseFuture.setClosed(AbstractChannel.java:355)
org.jboss.netty.channel.AbstractChannel.setClosed(AbstractChannel.java:185)
org.jboss.netty.channel.socket.nio.AbstractNioChannel.setClosed(AbstractNioChannel.java:197)
org.jboss.netty.channel.socket.nio.NioSocketChannel.setClosed(NioSocketChannel.java:84)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.close(AbstractNioWorker.java:357)
org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:93)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:109)
org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:90)
org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.java:724)
We changed the default of BytesStreamOutput (used in various places in ES) to 32k from 1k with the assumption that most stream tend to be large. This doesn't hold for example when indexing small documents and adding them using XContentBuilder (which will have a large overhead).
Default the buffer size to 2k now, but be relatively aggressive in expanding the buffer when below 256k (double it), and just use oversize (1/8th) when larger to try and minimize garbage and buffer copies.
relates to #3624closes#3638
we can use the index in the node ids list as the index for the array when we set the response or the exception, removing the need for an index AtomicInteger
This reverts commit e943cc81a5.
The more complex queries support causes StackOverflowErrors that
can influence the cluster performance and stability dramatically.
This commit backs out this change to reduce the risk for deep
stacks.
Reverts #3357
If the index shard is not started yet the underlying engine can
throw an exception since not everything is initialized. This can
happen if a shard is just about starting up or recovering / initalizing
and stats are requested.
Closes#3619
Britta Weber
Luca Cavanna
Simon Willnauer
David Pilato
Brad Fritz
Lee Hinman
Nik Everett
Shay Banon
Martijn van Groningen
Adrien Grand
Boaz Leskes
Clinton Gormley