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https://issues.apache.org/jira/browse/FLINK-14560?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16961971#comment-16961971
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fa zheng commented on FLINK-14560:
----------------------------------
who can assign this issue to me?
> The value of taskmanager.memory.size in flink-conf.yaml is set to zero will
> cause taskmanager not to work
> ----------------------------------------------------------------------------------------------------------
>
> Key: FLINK-14560
> URL: https://issues.apache.org/jira/browse/FLINK-14560
> Project: Flink
> Issue Type: Bug
> Components: Deployment / YARN
> Affects Versions: 1.9.0, 1.9.1
> Reporter: fa zheng
> Priority: Minor
> Fix For: 1.10.0, 1.9.2
>
> Original Estimate: 72h
> Remaining Estimate: 72h
>
> If you accidentally set taskmanager.memory.size: 0 in flink-conf.yaml, flink
> should take a fixed ratio with respect to the size of the task manager JVM.
> The relateted codes are in TaskManagerServicesConfiguration.fromConfiguration
> {code:java}
> //代码占位符
> // extract memory settings
> long configuredMemory;
> String managedMemorySizeDefaultVal =
> TaskManagerOptions.MANAGED_MEMORY_SIZE.defaultValue();
> if
> (!configuration.getString(TaskManagerOptions.MANAGED_MEMORY_SIZE).equals(managedMemorySizeDefaultVal))
> {
> try {
> configuredMemory =
> MemorySize.parse(configuration.getString(TaskManagerOptions.MANAGED_MEMORY_SIZE),
> MEGA_BYTES).getMebiBytes();
> } catch (IllegalArgumentException e) {
> throw new IllegalConfigurationException(
> "Could not read " + TaskManagerOptions.MANAGED_MEMORY_SIZE.key(), e);
> }
> } else {
> configuredMemory = Long.valueOf(managedMemorySizeDefaultVal);
> }{code}
> However, in FlinkYarnSessionCli.java, flink will translate the value to byte.
> {code:java}
> //代码占位符
> // JobManager Memory
> final int jobManagerMemoryMB =
> ConfigurationUtils.getJobManagerHeapMemory(configuration).getMebiBytes();
> // Task Managers memory
> final int taskManagerMemoryMB =
> ConfigurationUtils.getTaskManagerHeapMemory(configuration).getMebiBytes();
> {code}
>
> As a result, 0 will translate to 0 b and is different from default value. 0
> b will cause a error in following check code
> {code:java}
> //代码占位符
> checkConfigParameter(
>
> configuration.getString(TaskManagerOptions.MANAGED_MEMORY_SIZE).equals(TaskManagerOptions.MANAGED_MEMORY_SIZE.defaultValue())
> ||
> configuredMemory > 0, configuredMemory,
> TaskManagerOptions.MANAGED_MEMORY_SIZE.key(),
> "MemoryManager needs at least one MB of memory. " +
> "If you leave this config parameter empty, the system automatically " +
> "pick a fraction of the available memory.");
> {code}
>
>
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