There is a bug when a call to `BytesReferenceStreamInput` skip is made
on a `BytesReference` that has an initial offset. The offset for the
current slice is added to the current index and then subtracted from the
length. This introduces the possibility of a negative number of bytes to
skip. This happens inside a loop, which leads to an infinte loop.
This commit correctly subtracts the current slice index from the
slice.length. Additionally, the `BytesArrayTests` are modified to test
instances that include an offset.
Currently when we close a channel in Netty4Utils.closeChannels we
block until the closing is complete. This introduces the possibility
that a network selector thread will block while waiting until a
separate network selector thread closes a channel.
For instance: T1 closes channel 1 (which is assigned to a T1 selector).
Channel 1's close listener executes the closing of the node. That
means that T1 now tries to close channel 2. However, channel 2 is
assigned to a selector that is running on T2. T1 now must wait until T2
closes that channel at some point in the future.
This commit addresses this by adding a boolean to closeChannels
indicating if we should block on close. We only set this boolean to true
if we are closing down the server channels at shutdown. This call is
never made from a network thread. When we call the closeChannels method
with that boolean set to false, we do not block on close.
Transport profiles unfortunately have never been validated. Yet, it's very
easy to make a mistake when configuring profiles which will most likely stay
undetected since we don't validate the settings but allow almost everything
based on the wildcard in `transport.profiles.*`. This change removes the
settings subset based parsing of profiles but rather uses concrete affix settings
for the profiles which makes it easier to fall back to higher level settings since
the fallback settings are present when the profile setting is parsed. Previously, it was
unclear in the code which setting is used ie. if the profiles settings (with removed
prefixes) or the global node setting. There is no distinction anymore since we don't pull
prefix based settings.
This commit makes the use of the global network settings explicit instead
of implicit within NetworkService. It cleans up several places where we fall
back to the global settings while we should have used tcp or http ones.
In addition this change also removes unnecessary settings classes
These settings have not be working for a full major version since they
are not registered. Given that they are simply duplicates we can just remove
them.
Today TcpTransport is the de-facto base-class for transport implementations.
The need for all the callbacks we have in TransportServiceAdaptor are not necessary
anymore since we can simply have the logic inside the base class itself. This change
moves the stats metrics directly into TcpTransport removing the need for low level
bytes send / received callbacks.
We use assertBusy in many places where the underlying code throw exceptions. Currently we need to wrap those exceptions in a RuntimeException which is ugly.
Today if a channel gets closed due to a disconnect we notify the response
handler that the connection is closed and the node is disconnected. Unfortunately
this is not a complete solution since it only works for published connections.
Connections that are unpublished ie. for discovery can indefinitely hang since we
never invoke their handers when we get a failure while a user is waiting for
the response. This change adds connection tracking to TcpTransport that ensures
we are notifying the corresponding connection if there is a failure on a channel.
Get mappings HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for get
mappings HEAD requests, and just relying on the general mechanism that
exists for handling HEAD requests in the REST layer.
Relates #23192
Today when an exception is thrown handling a HEAD request, the body is
swallowed before the channel has a chance to see it. Yet, the channel is
where we compute the content length that would be returned as a header
in the response. This is a violation of the HTTP specification. This
commit addresses the issue. To address this issue, we remove the special
handling in bytes rest response for HEAD requests when an exception is
thrown. Instead, we let the upstream channel handle the special case, as
we already do today for the non-exceptional case.
Relates #25172
Previously the HEAD and GET aliases endpoints were misaigned in
behavior. The HEAD verb would 404 if any aliases are missing while the
GET verb would not if any aliases existed. When HEAD was aligned with
GET, this broke the previous usage of HEAD to serve as an existence
check for aliases. It is the behavior of GET that is problematic here
though, if any alias is missing the request should 404. This commit
addresses this by modifying the behavior of GET to behave in this
way. This fixes the behavior for HEAD to also 404 when aliases are
missing.
Relates #25043
Shared settings were added intially to allow the few common settings
names across aws plugins. However, in 6.0 these settings have been
removed. The last use was in netty, but since 6.0 also has the netty 3
modules removed, there is no longer a need for the shared property. This
commit removes the shared setting property.
This commit renames all rest test files to use the .yml extension
instead of .yaml. This way the extension used within all of
elasticsearch for yaml is consistent.
Netty removed a logging guarded we added to prevent a scary logging
message. We added a hack to work around this. They've added the guard
back, so we can remove the hack now.
Today we prune transport handlers in TransportService when a node is disconnected.
This can cause connections to starve in the TransportService if the connection is
opened as a short living connection ie. without sharing the connection to a node
via registering in the transport itself. This change now moves to pruning based
on the connections cache key to ensure we notify handlers as soon as the connection
is closed for all connections not just for registered connections.
Relates to #24632
Relates to #24575
Relates to #24557
In pre-release versions of Elasticsearch 5.0.0, users were subject to
log messages of the form "your platform does not.*reliably.*potential
system instability". This is because we disable Netty from being unsafe,
and Netty throws up this scary info-level message when unsafe is
unavailable, even if it was unavailable because the user requested that
it be unavailabe. Users were rightly confused, and concerned. So, we
contributed a guard to Netty to prevent this log message from showing up
when unsafe was explicitly disabled. This guard shipped with all
versions of Netty that shipped starting with Elasticsearch
5.0.0. Unfortunately, this guard was lost in an unrelated refactoring
and now with the 4.1.10.Final upgrade, users will again see this
message. This commit is a hack around this until we can get a fix
upstream again.
Relates #24469
Netty uses the number of processors for sizing various resources (e.g.,
thread pools, buffer pools, etc.). However, it uses the runtime number
of available processors which might not match the configured number of
processors as set in Elasticsearch to limit the number of threads (for
example, in Docker containers). A new feature was added to Netty that
enables configuring the number of processors Netty should see for sizing
this various resources. This commit takes advantage of this feature to
set this number of available processors to be equal to the configured
number of processors set in Elasticsearch.
Relates #24420
It looks like auto-complete gave us a nasty surprise here with
Logger#equals being invoked instead of Logger#error swallowing the
absolute worst-possible level of a log message. This commit fixes the
invocation.
This change simplifies how the rest test runner finds test files and
removes all leniency. Previously multiple prefixes and suffixes would
be tried, and tests could exist inside or outside of the classpath,
although outside of the classpath never quite worked. Now only classpath
tests are supported, and only one resource prefix is supported,
`/rest-api-spec/tests`.
closes#20240
This commit makes closing a ReleasableBytesStreamOutput release the underlying BigArray so
that we can use try-with-resources with these streams and avoid leaking memory by not returning
the BigArray. As part of this change, the ReleasableBytesStreamOutput adds protection to only
release the BigArray once.
In order to make some of the changes cleaner, the ReleasableBytesStream interface has been
removed. The BytesStream interface is changed to a abstract class so that we can use it as a
useable return type for a new method, Streams#flushOnCloseStream. This new method wraps a
given stream and overrides the close method so that the stream is simply flushed and not closed.
This behavior is used in the TcpTransport when compression is used with a
ReleasableBytesStreamOutput as we need to close the compressed stream to ensure all of the data
is written from this stream. Closing the compressed stream will try to close the underlying stream
but we only want to flush so that all of the written bytes are available.
Additionally, an error message method added in the BytesRestResponse did not use a builder
provided by the channel and instead created its own JSON builder. This changes that method to use
the channel builder and in turn the bytes stream output that is managed by the channel.
Note, this commit differs from 6bfecdf921 in that it updates
ReleasableBytesStreamOutput to handle the case of the BigArray decreasing in size, which changes
the reference to the BigArray. When the reference is changed, the releasable needs to be updated
otherwise there could be a leak of bytes and corruption of data in unrelated streams.
This reverts commit afd45c1432, which reverted #23572.
This commit makes closing a ReleasableBytesStreamOutput release the underlying BigArray so
that we can use try-with-resources with these streams and avoid leaking memory by not returning
the BigArray. As part of this change, the ReleasableBytesStreamOutput adds protection to only release the BigArray once.
In order to make some of the changes cleaner, the ReleasableBytesStream interface has been
removed. The BytesStream interface is changed to a abstract class so that we can use it as a
useable return type for a new method, Streams#flushOnCloseStream. This new method wraps a
given stream and overrides the close method so that the stream is simply flushed and not closed.
This behavior is used in the TcpTransport when compression is used with a
ReleasableBytesStreamOutput as we need to close the compressed stream to ensure all of the data
is written from this stream. Closing the compressed stream will try to close the underlying stream
but we only want to flush so that all of the written bytes are available.
Additionally, an error message method added in the BytesRestResponse did not use a builder
provided by the channel and instead created its own JSON builder. This changes that method to use the channel builder and in turn the bytes stream output that is managed by the channel.
This commit changes the listener passed to sendMessage from a Runnable
to a ActionListener.
This change also removes IOException from the sendMessage signature.
That signature is misleading as it allows implementers to assume an
exception will be thrown in case of failure. That does not happen due
to Netty's async nature.
This commit upgrades the Netty dependencies from version 4.1.8 to
version 4.1.9. This commit picks up a few bug fixes that impacted us:
- Netty was incorrectly ignoring interfaces with self-assigned MAC
addresses (e.g., instances running in Docker containers or on EC2)
- incorrect handling of the Expect: 100-continue header
Relates #23540
With this commit we change the default receive predictor size for Netty
from 32kB to 64kB as our testing has shown that this leads to less
allocations on smaller heaps like the default out of the box
configuration and this value also works reasonably well for larger
heaps.
Closes#23185
Previously, the RestController would stash the context prior to copying headers. However, there could be deprecation
log messages logged and in turn warning headers being added to the context prior to the stashing of the context. These
headers in the context would then be removed from the request and also leaked back into the calling thread's context.
This change moves the stashing of the context to the HttpTransport so that the network threads' context isn't
accidentally populated with warning headers and to ensure the headers added early on in the RestController are not
excluded from the response.
The dependencyLicenses check has the ability to map multiple jar files
to the same license file. However, netty was not taking advantage of
this, and had duplicate copies of its license/notice files for each jar.
This commit reduces the copies to one and uses the mapping feature.
This commit sets the intial size of the pipeline handler queue small to
prevent waste if pipelined requests are never sent. Since the queue will
grow quickly if pipeline requests are indeed set, this should not be
problematic.
Relates #23335
When pipelined responses are sent to the pipeline handler for writing,
they are not necessarily written immediately. They must be held in a
priority queue until all responses preceding the given response are
written. This means that when write is invoked on the handler, the
promise that is attached to the write invocation will not necessarily be
the promise associated with the responses that are written while the
queue is drained. To address this, the promise associated with a
pipelined response must be held with the response and then used when the
channel context is actually written to. This was introduced when
ensuring that the releasing promise is always chained through on write
calls lest the releasing promise never be invoked. This leads to many
failing test cases, so no new test cases are needed here.
Relates #23317
When sending a response to a client, we attach a releasing listener to
the channel promise. If the client disappears before the response is
sent, the releasing listener was never notified. The reason the
listeners were never notified was due to a mistaken invocation of write
and flush on the channel which has two overrides: one that takes an
existing promise, and one that does not and instead creates a new
promise. When the client disappears, it is this latter promise that is
notified, which does not contain the releasing listener. This commit
addreses this issue by invoking the override that passes our channel
promise through.
Relates #23310
Previously we calculated Netty' receive predictor size for HTTP and transport
traffic based on available memory and worker nodes. This resulted in a receive
predictor size between 64kb and 512kb. In our benchmarks this leads to increased
GC pressure.
With this commit we set Netty's receive predictor size to 32kb. This value is in
a sweet spot between heap memory waste (-> GC pressure) and effect on request
metrics (achieved throughput and latency numbers).
Closes#23185
This commit enforces the requirement of Content-Type for the REST layer and removes the deprecated methods in transport
requests and their usages.
While doing this, it turns out that there are many places where *Entity classes are used from the apache http client
libraries and many of these usages did not specify the content type. The methods that do not specify a content type
explicitly have been added to forbidden apis to prevent more of these from entering our code base.
Relates #19388
Get HEAD requests incorrectly return a content-length header of 0. This
commit addresses this by removing the special handling for get HEAD
requests, and just relying on the general mechanism that exists for
handling HEAD requests in the REST layer.
Relates #23186
Get source HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for get
source HEAD requests, and just relying on the general mechanism that
exists for handling HEAD requests in the REST layer.
Relates #23151
When Netty decodes a bad HTTP request, it marks the decoder result on
the HTTP request as a failure, and reroutes the request to GET
/bad-request. This either leads to puzzling responses when a bad request
is sent to Elasticsearch (if an index named "bad-request" does not exist
then it produces an index not found exception and otherwise responds
with the index settings for the index named "bad-request"). This commit
addresses this by inspecting the decoder result on the HTTP request and
dispatching the request to a bad request handler preserving the initial
cause of the bad request and providing an error message to the client.
Relates #23153
This commit adds a new method to the TransportChannel that provides access to the version of the
remote node that the response is being sent on and that the request came from. This is helpful
for serialization of data attached as headers.
Template HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for
template HEAD requests, and just relying on the general mechanism that
exists for handling HEAD requests in the REST layer.
Relates #23130
Index HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for index
HEAD requests, and just relying on the general mechanism that exists for
handling HEAD requests in the REST layer.
Relates #23112
Alias HEAD requests incorrectly return a content-length header of
0. This commit addresses this by removing the special handling for alias
HEAD requests, and just relying on the general mechanism that exists for
handling HEAD requests in the REST layer.
Relates #23094
Netty 4.1.8 wraps connect and accept operations in doPrivileged blocks.
This means that we not need to give permissions to the entire transport
module. Additionally this commit deletes the privileged socket channel
and privileged server socket chanel.
Tim Brooks
Simon Willnauer
Jason Tedor
Boaz Leskes
Ryan Ernst
Jay Modi
Daniel Mitterdorfer
javanna
sabi0