`LocalDiscovery` is a discovery implementation that uses static in memory maps to keep track of current live nodes. This is used extensively in our tests in order to speed up cluster formation (i.e., shortcut the 3 second ping period used by `ZenDiscovery` by default). This is sad as that mean that most of the test run using a different discovery semantics than what is used in production. Instead of replacing the entire discovery logic, we can use a similar approach to only shortcut the pinging components.
This change proposes the removal of all non-tcp transport implementations. The
mock transport can be used by default to run tests instead of local transport that has
roughly the same performance compared to TCP or at least not noticeably slower.
This is a master only change, deprecation notice in 5.x will be committed as a
separate change.
Today when parsing a request, Elasticsearch silently ignores incorrect
(including parameters with typos) or unused parameters. This is bad as
it leads to requests having unintended behavior (e.g., if a user hits
the _analyze API and misspell the "tokenizer" then Elasticsearch will
just use the standard analyzer, completely against intentions).
This commit removes lenient URL parameter parsing. The strategy is
simple: when a request is handled and a parameter is touched, we mark it
as such. Before the request is actually executed, we check to ensure
that all parameters have been consumed. If there are remaining
parameters yet to be consumed, we fail the request with a list of the
unconsumed parameters. An exception has to be made for parameters that
format the response (as opposed to controlling the request); for this
case, handlers are able to provide a list of parameters that should be
excluded from tripping the unconsumed parameters check because those
parameters will be used in formatting the response.
Additionally, some inconsistencies between the parameters in the code
and in the docs are corrected.
Relates #20722
this change adds a hard limit to `index.number_of_shard` that prevents
indices from being created that have more than 1024 shards. This is still
a huge limit and can only be changed via settings a system property.
Today when executing the install plugin command without a plugin id, we
end up throwing an NPE because the plugin id is null yet we just keep
going (ultimatley we try to lookup the null plugin id in a set, the
direct cause of the NPE). This commit modifies the install command so
that a missing plugin id is detected and help is provided to the user.
Relates #20660
When testing tribe nodes in an integration test, we should pass the classpath
plugins of the node down to the tribe client nodes. Without this the tribe client
nodes could be prevented from communicating with the tribes.
Today when CLI tools are executed, logging statements can intentionally
or unintentionally be executed when logging is not configured. This
leads to log messages that the status logger is not configured. This
commit reworks logging configuration for CLI tools so that logging is
always configured.
Relates #20575
This PR introduces backward compatibility index tests to test the rolling upgrade process amongst Elasticsearch instances within the same major version. The test executes in three phases. In the first phase, we form a cluster of 2 ES instances on an old version. In the second phase, we keep one of the nodes from the old cluster, kill the other node, but preserve its data directory and start an instance of the current version of ES using the same data directory as the killed instance. In the third phase, we kill the other old version ES instance from the first phase and launch a new instance, using the same data directory as the killed instance. Therefore, during phase 3, we have fully migrated and have all current versions of ES running. In each phase, we run REST tests that index documents and search them, ensuring at each stage that the documents from the previous phase are still there.
Note that because we haven't released a GA yet of 5.0, the tests currently don't start an old version cluster in the first phase. Once GA is released, this will be changed to make the backward compatibility version 5.0, while the current version in the cluster will be 5.x.
automatically between tasks, as we want some of the nodes from
the previous task to continue running in the next task. This
commit enables a cluster configuration setting to not stop
nodes automatically after a task runs, but instead the creator
of the test task must stop the running nodes explicitly in a
cleanup phase.
cluster, we wait for the cluster health to indicate the
necessary nodes have formed a cluster. This check was an
exact value (equality) check. However, if we are trying to
connect the nodes in the cluster to nodes from a previously
formed cluster (of the same name), then we will have more
nodes returned by the cluster health check than the current
task's configured number of nodes. Hence, this check needs
to be a >= check. This commit fixes it.
Today when starting Elasticsearch without a Log4j 2 configuration file,
we end up throwing an array index out of bounds exception. This is
because we are passing no configuration files to Log4j. Instead, we
should throw a useful error message to the user. This commit modifies
the Log4j configuration setup to throw a user exception if no Log4j
configuration files are present in the config directory.
Relates #20493
BATS upgrade tests fails on master branch because it tries to install 2.x versions to upgrade from instead of 5.x versions. And since #18554 we should only test upgrades from 5.0.0-alpha4 versions.
This commit changes the vagrant tests so that it tries to list all the previous releases from version N-1. If nothing is found, it will fetch the current version and will run the upgrade tests with it. It works nicely with the current master 6.0.0-alpha1-SNAPSHOT. Once 5.0.0 is released it should run the test with it.
When uninstalling or upgrading elasticsearch using the RPM package some empty directories remain on the filesystem:
/usr/share/elasticsearch/bin
/usr/share/elasticsearch/lib
/usr/share/elasticsearch/modules
/usr/share/elasticsearch/modules/foo
Having empty directories in modules can prevent elasticsearch to start after an upgrade: the plugins service expects to find a plugin-descriptor.properties file in every sub directory of modules.
This PR cleans things a bit so that these empty directories are removed on upgrade/removal like it was in 2.x.
The Log4j shutdown hack test tests that a hack we have in place to
workaround a bug in Log4j during shutdown is effective. Log4j can use
JMX to control logging levels, but we disable this through the use of a
system property log4j2.disable.jmx (mainly because there is no need for
this feature, but it also means granting additional security
permissions). The bug in Log4j is that during shutdown, it neglects to
check whether or not its usage of JMX is disable and so it attempts to
unregister management beans, leading to a permissions violation. The
test works by attempting to shutdown Log4j and thus triggering the bad
code path. With the Log4j hack in place, we have introduced jar hell so
that its our code running instead of code from the Log4j jar. Our code
correctly checks that the usage of JMX is disabled and thus does not
trip on a permissions violation. The test was a little complicated in
that it attempted to just grant the minimal permissions needed for Log4j
to do its thing, but this can sometimes lead to other unwanted
permissions violations because the permissions put in place are more
restrictive necessary. This commit simplifies this situation by
rewriting the test to only deny Log4j the sole permission needed to
trigger the bug.
Relates #20476
When upgrading elasticsearch using the RPM package, the scripts directory is removed if it's empty but it won't be recreated by the upgraded package. But after that the service won't start because the scripts dir is missing.
Today when setting the logging level via the command-line or an API
call, the expectation is that the logging level should trickle down the
hiearchy to descendant loggers. However, this is not necessarily the
case. For example, if loggers x and x.y are already configured then
setting the logging level on x will not descend to x.y. This is because
the logging config for x.y has already been forked from the logging
config for x. Therefore, we must explicitly descend the hierarchy when
setting the logging level and that is what this commit does.
Relates #20463
This commit introduces a new plugin for file-based unicast hosts
discovery. This allows specifying the unicast hosts participating
in discovery through a `unicast_hosts.txt` file located in the
`config/discovery-file` directory. The plugin will use the hosts
specified in this file as the set of hosts to ping during discovery.
The format of the `unicast_hosts.txt` file is to have one host/port
entry per line. The hosts file is read and parsed every time
discovery makes ping requests, thus a new version of the file that
is published to the config directory will automatically be picked
up.
Closes#20323
Today we add a prefix when logging within Elasticsearch. This prefix
contains the node name, and index and shard-level components if
appropriate.
Due to some implementation details with Log4j 2 , this does not work for
integration tests; instead what we see is the node name for the last
node to startup. The implementation detail here is that Log4j 2 there is
only one logger for a name, message factory pair, and the key derived
from the message factory is the class name of the message factory. So,
when the last node starts up and starts setting prefixes on its message
factories, it will impact the loggers for the other nodes.
Additionally, the prefixes are lost when logging an exception. This is
due to another implementation detail in Log4j 2. Namely, since we log
exceptions using a parameterized message, Log4j 2 decides that that
means that we do not want to use the message factory that we have
provided (the prefix message factory) and so logs the exception without
the prefix.
This commit fixes both of these issues.
Relates #20429
This commit adds a -q/--quiet option to Elasticsearch so that it does not log anything in the console and closes stdout & stderr streams. This is useful for SystemD to avoid duplicate logs in both journalctl and /var/log/elasticsearch/elasticsearch.log while still allows the JVM to print error messages in stdout/stderr if needed.
closes#17220
The plugin command now displays the version of the plugin, which is
compared to a string without the version. This removes the version from
the string.
The evil logger tests rely on external configuration. This configuration
is shared between these tests which means that changing the
configuration for one test can cause an unrelated test to fail. In
particular, removing the appenders on the root logger so that inherited
loggers in one test do not have a console and file appender by default
breaks tests that were expecting the root logger to have these
appenders. This commit separates these configs so that these tests are
not subject to this problem.
Log4j has a bug where on shutdown it ignores that JMX might be disabled;
since it does not respect this on shutdown, it proceeds to attempt to
access JMX leading to a security exception that should have otherwise
not occurred had it respected that JMX is disabled. This commit
intentionally introduces jar hell with the Server class to work around
this bug until a fix is released.
Relates #20389
Previously we would disable console logging in certain circumstances
(for example, if Elasticsearch is not in the foreground, or if
Elasticsearch is in the foreground but an exception was thrown during
bootstrap). This commit makes this handling work with Log4j 2. This will
prevent users from seeing double bootstrap check failure messages.
Relates #20387
Previous versions of Elasticsearch permitted unquoted JSON field names even though this is against the JSON spec. This leniency was disabled by default in the 5.x series of Elasticsearch but a backwards compatibility layer was added via a system property with the intention of removing this layer in 6.0.0. This commit removes this backwards compatibility layer.
Relates #20388
The 5.x series of Elasticsearch emits a warning if any of the old
logging configuration formats are present. This commit removes that
warning.
Relates #20386
By default, when an exception causes the JVM to terminate, the stack
trace is printed. In the case of failing bootstrap checks, this stack
trace is useless to the user, and might even distract them from seeing
that the bootstrap checks failed for reasons under their control. With
this commit, we cause the stack trace for a failing bootstrap check to
be truncated.
We also modify some methods to not declare that they throw the top level
checked exception type Exception, but instead explicitly declare the
exceptions that they throw. These exceptions are caught and wrapped in a
BootstrapException so that we can percolate only two exception types out
of Bootstrap#init as checked exception, BootstrapException and
NodeValidationException.
Relates #19989
The logging configuration tests write to log files which are deleted at
the end of the test. If these files are not closed, some operating
systems will complain when these deletes are performed. This commit
ensures that the logging system is properly shutdown so that these files
can be properly deleted.
The evil logging tests write to log files which are deleted at the end
of the test. If these files are not closed, some operating systems will
complain when these deletes are performed. This commit ensures that the
logging system is properly shutdown so that these files can be properly
deleted.
Tal Levy
Boaz Leskes
Dimitrios Liappis
Jason Tedor
Alexander Reelsen
Simon Willnauer
Simon Willnauer
Jay Modi
Ali Beyad
David Pilato
Tanguy Leroux
Lee Hinman